2018 Chevrolet Silverado 1500
Problems, recalls and owner-reported issues
Power train is the leading concern among 519 owner complaints filed for this model year. This is the 11th highest complaint count among 19 Silverado 1500 model years with reports.
Of the 2018 reports, 10 involved a crash and 4 involved a fire. 11 people were injured and 1 person died.
What owners report most often
Recalls and investigations
Air bagsMay 21, 2026
General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2019 Chevrolet Silverado 2500, Silverado 3500, GMC Sierra 2500, and Sierra 3500 vehicles. The left-side or right-side roof rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may rupture.
A detached end cap or inflator rupture can allow compressed gas to escape and project the end cap or fragments of the inflator into the vehicle, increasing the risk of injury.
Dealers will replace both RRAB modules, free of charge. Owner notification letters were mailed June 24, 2026. Owners may contact GMC customer service at 1-888-988-7267 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N262557310. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on May 21, 2026. This recall expands previous NHTSA recall number 26V166.
Campaign 26V325000 on NHTSA.gov
Air bagsMar 19, 2026
General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2019 Chevrolet Silverado 2500, Silverado 3500, GMC Sierra 2500, and Sierra 3500 Crew Cab vehicles. The left or right-side roof rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may rupture.
A detached end cap or inflator rupture can allow compressed gas to escape and project the end cap or fragments of the inflator into the vehicle, increasing the risk of injury.
Dealers will replace the left and right-side RRAB modules, free of charge. Owner notification letters were mailed April 16, 2026. Owners may contact GMC customer service at 1-888-988-7267 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N262549710. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on March 19, 2026.
Campaign 26V166000 on NHTSA.gov
Air bagsJun 26, 2025
General Motors (GM) is recalling certain 2018 GMC Sierra 1500, 2019 Sierra 2500, 3500, Chevrolet Silverado 3500, and Chevrolet Silverado 2500 and 2018 Chevrolet Silverado 1500 Crew Cab vehicles. The left or right-side roof-rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may rupture.
A detached end cap or inflator rupture can allow compressed gas to escape and project the end cap or fragments of the inflator into the vehicle, increases the risk of injury or crash.
Dealers will replace the left and right side RRAB modules, free of charge. Owner notification letters were mailed July 23, 2025. Owners may contact GMC customer service at 1-888-988-7267 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N252513060.
Campaign 25V432000 on NHTSA.gov
Air bags, side/window, curtain, inflatorOct 10, 2024
General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2018-2019 Chevrolet Silverado 2500, 3500, and GMC Sierra 2500, 3500 Crew Cab trucks. The left or right-side roof-rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may rupture.
A separated inflator end cap or inflator rupture can allow compressed gas to escape, resulting in the end cap or other components being propelled into the vehicle, increasing the risk of injury or crash.
Dealers will replace the left and right side RRAB modules, free of charge. Owner notification letters were mailed November 8, 2024. Owners may contact Chevrolet customer service at 1-800-222-1020, and GMC Customer Service at 888-988-7267. GM's number for this recall is N242474500.
Campaign 24V756000 on NHTSA.gov
Service brakes, hydraulic, power assist, vacuumOct 1, 2020
General Motors LLC (GM) is recalling certain 2018 Cadillac Escalade, Chevrolet Silverado 1500 and Tahoe, GMC Sierra 1500 and Yukon vehicles equipped with either a 5.3L or 6.2L V8 engine. The output of the mechanical vacuum pump can decrease over time, decreasing the amount of vacuum/power brake assist.
A decrease in brake assist can increase the brake pedal effort and distance required to stop the vehicle, increasing the risk of a crash.
GM will notify owners, and dealers will reprogram the Electronic Brake Control Module, free of charge. The recall began November 11, 2020. Owners may contact GM customer service at 1-866-522-9559, Cadillac customer service at 1-800-458-8006 or Chevrolet customer service at 1-800-630-2438. GM's number for this recall is N202300860.
Campaign 20V603000 on NHTSA.gov
Service brakes, hydraulic, antilock/traction control/electronic limited slip, wheel speed sensor/tone ringOct 24, 2019
General Motors LLC (GM) is recalling certain 2015-2020 Chevrolet Suburban, Tahoe, and GMC Yukon, and 2014-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles equipped with a 5.3-liter engine, a 3.08-ratio rear axle and four-wheel drive. If a wheel-speed sensor fails, while the vehicle is traveling between 41 and 60 mph in four-wheel or automatic mode, the Electronic-Brake Control Module (EBCM) software may activate the driveline-protection system.
Unintended activation of the driveline-protection system will cause unintended braking on the wheel on the opposite side of the failed sensor, causing the vehicle to pull to one side unexpectedly, increasing the risk of a crash.
GM will notify owners, and dealers will reprogram the EBCM, free of charge. The recall began December 11, 2019. Owners may contact Chevrolet customer service at 1-800-630-2438 or GMC customer service at 1-800-462-8782. GM's number for this recall is N192261050.
Campaign 19V761000 on NHTSA.gov
Service brakes, hydraulic, power assist, vacuumSep 6, 2019
General Motors LLC (GM) is recalling certain 2015-2017 Cadillac Escalade, 2014-2018 Chevrolet Silverado, GMC Sierra, 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles. The amount of vacuum created by the vacuum pump may decrease over time.
As the vacuum level drops, the brake assist decreases, increasing braking effort, extending the distance required to stop the vehicle, thereby increasing the risk of a crash.
GM will notify owners, and dealers will reprogram the Electronic Brake Control Module, free of charge. The recall began October 8, 2019. Owners may contact Chevrolet customer service at 1-800-630-2438, Cadillac customer service at 1-800-458-8006 or GMC customer service at 1-800-462-8782. GM's number for this recall is N192268490.
Campaign 19V645000 on NHTSA.gov
Representative owner complaints: power train
170 reports, newest first. Show all
Power train, Jun 29, 2021
The transmission clunks and slips a lot.
Power train, Jun 21, 2021
Radiator developed a leak as described in General Motor's Service Bulletin PI1513F dated January, 2019. Safety was put at risk due to having a vehicle which could have a sudden radiator failure and permanently damage the vehicle. The Dealership I had my radiator replaced at would not state if they have had this issue occur often. No warning lamps or messages prior to the radiator losing 1.5 gallons of coolant. My first symptom was the engine overheating.
Power train, Jun 17, 2021
While driving or idling Transmission temp was around and staying at 240.
Power train, May 25, 2021
While driving highway speed on cruise control the RPM levels start jumping up and down and it feels like your driving over the rumble strips. It only last for a second or two at a time, but it does do it a good amount of times while driving.
Power train, Apr 28, 2021
HARD DOWNSHIFT FROM 2ND TO 1ST
Power train, Apr 14, 2021
WHEN COMING TO A FULL STOP, THE TRANSMISSION DOWN SHIFT REALLY HARD. IT MAKES THE VEHICLE JERK FORWARD. IT DOESN'T MATTER IF YOU ARE GOING UP HILL/DOWNHILL OR ON A FLAT ROAD. I TOOK IT TO THE DEALER AT 4K MILES FOR THIS REASON AND WAS TOLD IT WAS A KNOWN CHEVY ISSUE BUT THAT THEY HAD NO WAY OF FIXING IT.I TOOK IT BACK A SECOND TIME AT 5K AND WAS TOLD THE JERKINESS AND POOP THE TRANSMISSION DOES IS A GM DEFECT DESIGN BUT THAT THEY HAD NO WAY OF FIXING. DEALER SAID OTHER OWNERS HAVE INSTALLED A 3RD PARTY SINGLE PIECE DRIVE SHAFT WITH ANGLE SPACERS BUT THAT WAS NOT COVERED BY GM WARRANTY. DEALER ESSENTIALLY WANTED ME TO FIX THE HARSH SHIFTING AND CLUNKINESS BY GOING WITH AN AFTER MARKET PARTS PROVIDER. A WORK AROUND THAT HAS SEEM TO MAKE THE ISSUE MORE BEARABLE IS PUTTING THE TRUCK IN 'TOW MODE' IT SMOOTHS THE RIDE OUT BUT IT TENDS TO MAKE THE TRANSMISSION RUN ABOUT 20'40 DEGREES HOTTER
Power train, Mar 16, 2021
TL* THE CONTACT OWNS A 2018 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 55 MPH, A WARNING LIGHT INDICATING THAT THE TRANSMISSION WAS OVERHEATING ILLUMINATED. THE CONTACT PULLED OVER AND TURNED-OFF AND RESTARTED THE VEHICLE AND CONTINUED DRIVING. THE WARNING LIGHT DISAPPEARED. THE CONTACT TOOK THE VEHICLE TO PENDARVIS CHEVROLET COMPANY, INC. (650 AUGUSTA RD, EDGEFIELD, SC 29824, (803) 639-8117) WHO FLUSHED THE TRANSMISSION AND REMOVED THE THERMOSTAT AND PLUGGED ONE LINE DIRECTLY TO THE TRANSMISSION. THE FAILURE RECURRED AND THE CONTACT TOOK THE VEHICLE BACK TO THE DEALER WHO THEN REPAIRED THE TORQUE CONVERTER. THE FAILURE RECURRED WHENEVER THE CONTACT WOULD ATTACH A LOAD TO THE VEHICLE AND THE VEHICLE WAS RETURNED TO THE DEALER A THIRD TIME HOWEVER, THE MECHANIC WAS UNABLE TO IDENTIFY THE CAUSE OF THE FAILURE. THE VEHICLE HAD NOT BEEN REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 59,000.
Power train, Mar 5, 2021
FAILED TO SHIFT GEARS. JERKING AND SHAKING. BUNNING SMELL. FAILED TO MOVE IN DRIVE OR REVERSE. CHECK ENGINE LIGHT EVENTUALLY CAME ON. STILL HAS TRANSMISSION FLUID.
Power train, Structure, Service brakes, Feb 9, 2021
TRANSMISSION LOCKED UP AND FAILED. ACTED LIKE IT BOUND UP. THIS HAPPENED DURING A NORMAL SHIFT SEQUENCE, ACTED TIGHT THEN ENGINE JUST KEPT OVER REVVING. HAPPENED ABOUT 3-4 MONTHS AGO. DEALER FIXED FOR FREE. SAID IT WAS COMMON. THIS HAPPENED RIGHT AT 60K MILES. SAID IF IT HAPPENS AGAIN THEY WILL NOT WARRANTY IT AS THERE IS NO FIX FOR THIS PROBLEM. SUGGESTED I BUY ANOTHER NEW TRUCK. NEXT PROBLEM IS MY RIGHT FRONT CALIPER HAS FAILED TWICE AND NEEDED COMPLETE REPLACEMENT. IT IS NOW FAILING FOR THE THIRD TIME. THIS IS SERIOUSLY UNSAFE AND CRAZY. I HAVE ONLY ABOUT 73K MILES ON THIS TRUCK. THIRD THING IS MY CHROME TRIM ON MY DOOR HANDLES HAS REPEATEDLY FAILED. I WAS TOLD BY MY DEALER THIS IS NORMAL AND IT IS NOT FIXABLE UNLESS I PAY THEM. IT IS NOT NORMAL WEAR AND TEAR. THE TRUCK IS BABIED AND KEPT IN PERFECT CONDITION.
Power train, Feb 4, 2021
WHEN I PLACE THE TRUCK IN DRIVE IN THE MORNING OR AFTER THE TRUCK HAS BEEN SITTING FOR MORE THAN A FEW HOURS, THE TRANSMISSION ENGAGES HARD, LURCHING THE TRUCK BODY FOWARD. THE DEALERSHIP ACKNOWLEDGES THE PROBLEM, BUT SAID THERE IS NO FIX.
Power train, Feb 2, 2021
WHEN I DRIVE I GET A HARD SHIFT/SLIPPING WHEN TAKING OFF AND I GET A HARD DOWNSHIFT WHEN SLOWING DOWN OR COMING TO A STOP. I HAVE TAKEN IT TO THE DEALER AND THEY SAY THEY FIX IT, RETURN IT, AND SAME PROBLEM. WHEN I COME TO A STOP AND AM SITTING FOR A WHILE THE VEHICLE BEGINS TO SHAKE OUT OF NOWHERE.
Steering, Power train, Electrical system, Jan 12, 2021
TRUCK STATIONARY. STARTED ENGINE. IMMEDIATELY MESSAGE SHOWED UP ON DASHBOARD INDICATING STEERING ASSIST LOW, DRIVE CAREFULLY. NO POWER STEERING. TRACTION CONTROL WARNING LIT. SHIFTED INTO REVERSE; TRUCK WOULD NOT MOVE AS IF IN NEUTRAL. TRUCK MOVE MOVE FORWARD IN DRIVE BUT WOULD NOT SHIFT OUT OF LOW GEAR. ALSO TRACTION CONTROL SYMBOIL TURNED ON. TOOK IT TO PETERS CHEVROLET LONGVIEW, TX. DEALERSHIP FOUND NO ISSUES.
Power train, Engine, Dec 19, 2020
COOLANT WATER KEEPS SPILLING FROM WATER PUMP. AS I WAS DRIVING ON THE FREEWAY, THE PUMP BLEW AND SPILLED ALL THE COOLANT AND HAD TO PULL OVER TO THE SIDE. HAD TO GET IT REPLACED PAID $150 FOR THE PART AND THAN LABOR ANOTHER $150. TRUCK HAS LESS THAN 30K MILES AND THE WATER PUMP ALREADY BREAKING DOWN. NEW VEHICLES ARE NOW DESIGNED TO BREAK ON YOU EASILY SO US CUSTOMERS SPEND MORE ON PARTS AND LABOR.
Power train, Engine, Nov 3, 2020
TRANSMISSION OVERHEATS WHEN BACKING A TRAILER UP A SLIGHT HILL AND WILL NOT MOVE UNTILE IT COOLS DOWN.
Power train, Oct 13, 2020
TRANSMISSION PROBLEMS INCLUDING SLIPPING, SHIFTING HARSHNESS, CLUNKING, ESPECIALLY ON DOWNSHIFTS AND SLIPPING WHEN TOWING. CLUNKING NOISE/FEEL WHEN SLOWING DOWN/STOPPING. ESPECIALLY NOTICEABLE ON HILLS, BUT PRESENT ON FLAT AND DOWNHILL ROADS AT SURFACE STREETS AS WELL AS FREEWAYS AND HIGHWAYS. PROBLEM FIRST BROUGHT TO CHEVROLET'S SERVICE DEPT AT 7000 MILES AND TOLD IT'S NORMAL. AGAIN BROUGHT TO SERVICE DEPT ATTENTION AT APPROXIMATELY 12000 MILES AND AGAIN TOLD IT'S NORMAL. PROBLEM CONTINUED TO WORSEN SEVERELY AND AGAIN BROUGHT TO SERVICE DEPT ATTENTION AT APPROXIMATELY 15000 MILES. PROBLEM DIAGNOSED AS FAILING TORQUE CONVERTER. THIS WAS REPLACED. PROBLEM WITH TRANSMISSION CONTINUES AFTER REPLACEMENT AND AT 16197 MILES IT IS NOW BACK AT THE SERVICE DEPT.TRANSMISSION IS THE 6 SPEED AUTOMATIC.
Power train, Aug 24, 2020
MY VEHICLE IS HAVING HARD DOWNSHIFTING ISSUES. MAINLY FROM 2 TO 1 AND OCCASIONALLY FROM 3 TO 2. I NOTICE THERE ISNT A RECALL LISTED BUT IT DEFINITELY SEEMS LIKE A SERIOUS ISSUE. THAT COULD POSSIBLE CAUSE DAMAGE LATER ON. I'VE READ ONLINE THAT IT SEEMS TO BE A PRETTY COMMON ISSUE WITH THE SILVERADO 2014-2019. I WOULD LIKE AND EXPLANATION AND FIX PLEASE. CHEVROLET HAS CHECKED AND SAID IT DOESN'T READ AS AN ISSUE ON COMPUTER READING. THANKS
Power train, Aug 20, 2020
ON 8/17/2020 I STARTED GETTING A SEVERE SHAKING IN THE FRONT END OF MY 2018 CHEVROLET SILVERADO CREW CAB 4X4 LTZ. THINKING THAT I THREW JUST A WHEEL WEIGHT I TOOK IT TO MY PRIORITY CHEVROLET IN CHESAPEAKE VIRGINIA AND FOUND OUT IT HAS A SHUTTER SHAKE AS THE DEALERSHIP CALLED IT. AFTER DOING RESEARCH ON THIS I HAVE FOUND THAT THERE IS A CLASS ACTION LAW SUITE AGAINST GM ON THIS MATTER AND IS A VERY COMMON PROBLEM THAT PEOPLE ARE HAVING FROM YEARS 2014 THRU 2019. I WOULD THINK AFTER ALL THIS INFORMATION ON THIS A RECALL WOULD BE PUT OUT ON THIS.I DO NOT HAVE ANY DOCUMENTATION AT THIS TIME DUE TO IT STILL BEING AT DEALERSHIP FOR REPAIR.THIS HAPPENED WHILE DRIVING ON INTERSTATE 64 EAST BOUND AT A SPEED OF 55 UP TO 65 WHEN PROBLEM OCCURRED.
Power train, Engine, Aug 9, 2020
WHILE DRIVING ON INTERSTATE TOWING EMPTY 12' TRAILER, THE ENGINE STOPPED AND RECEIVED STABILITRACK MESSAGE AND TRANSMISSION TOO HOT. THIS HAPPENED AGAIN AFTER LETTING ENGINE COOL DOWN. HAD THE TRAMISSION FLUID CHANGED TWO DAYS LATER. DEALER JUST STATED THEIR WAS A LOSS OF COMMUNICATION WITH THE ENGINE. ONE WEEK LATER RECEIVED TRANSMISSION HOT, IDLE ENGINE MESSAGE ON THE INTERSTATE WHILE HAULING THE SAME TRAILER WITH ONLY A RIDING LAWNMOWER. PULLED OVER FOR 30 MINUTES AND DROVE THE REST OF THE WAY HOME AT A REDUCED SPEED. HIGHWAY SPEED WAS 70 MPH UNTIL IT OVERHEATED, THEN DROVE 50-55 MPH TO GET TO MY DESTINATION TRYING NOT TO LET TRANSMISSION TEMPERATURE OVER 220.
Power train, Engine, Jun 15, 2020
THE PLASTIC RADIATOR HAS CRACKED AND IS LEAKING COOLANT HEAVILY. TRUCK STILL UNDER POWERTRAIN WARRANTY BY GM IS ONLY OFFERING TO COVER 20% OF THE $1,823 REPAIR COST. I NOTICED IT WHEN STOPPED TO GET GAS, THE VEHICLE LEAKING APPROXIMATELY 1.5 GALLONS OF COOLANT WHILE STOPPED FOR APPROXIMATELY 3 MINUTES. THIS CAUSED THE VEHICLE TO OVERHEAT AND NEEDED TO ADD COOLANT JUST TO DRIVE TO SHOP. *TR
Power train, Electrical system, Fuel/propulsion system, Jun 5, 2020
WHEN I OPENED DOORS THE FUEL PUMP TURNS ON, WHILE I'M DRIVING IT SHIFTS AND RUNS FUNNY AND YOU HEAR POPPING NOISES. THE GAUGES MESS UP AND RADIO TURNS ON AND OFF. LIKE ITS BEING HACKED. *TR
Power train, May 11, 2020
TL* THE CONTACT OWNS A 2018 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 35-50 MPH, THE VEHICLE DECELERATED, SHUDDERED AND LOSS MOTIVE POWER. THE CHECK ENGINE AND TRACTION CONTROL WARNING LIGHTS WERE ILLUMINATED. A WARNING MESSAGE INDICATED TRANSMISSION NEEDED TO COOL OFF; STOP THE VEHICLE. THE CONTACT CALLED STEVES CHEVROLET OF CHOWCHILLA LOCATED AT 1 AUTO PARK DR, CHOWCHILLA, CA 93610, AND INFORMED THEM OF THE FAILURE. THE CONTACT WAS ADVISED TO SCHEDULE AN APPOINTMENT TO HAVE THE VEHICLE DIAGNOSED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND INFORMED THE CONTACT THAT THE VEHICLE WAS NOT PART OF A RECALL. THE FAILURE MILEAGE WAS 79,800.
Suspension, Power train, Engine, May 1, 2020
TRANSMISSION SHIFTS HARD FROM FIRST TO SECOND/SECOND BACK TO FIRST. I NOTICED THIS ABOUT A WEEK AFTER PURCHASING TRUCK. SHIFTS HARD MOSTLY IN 2WD, NOT SO MUCH IN 4WD OR HAULING/TOWING. LEAF SPRINGS AND SHACKLES HAVE SQUEAKED SINCE DAY ONE OF PURCHASE. ENGINE OIL PRESSURE IS AT 12-15PSI AT IDLE AND WILL NOT EXCEED 32-35 PSI UNDER NORMAL CONDITIONS WITH OR WITHOUT A LOAD. I'VE CHANGED THE OIL FILTER AND OIL PRESSURE SENSOR MULTIPLE TIMES. THERE ALSO SEEMS TO BE A CHIRP/TICK COMING FROM THE PASSENGER SIDE OF THE ENGINE COMPARTMENT. I'VE BEEN TRYING TO NARROW IT DOWN FOR THE LAST FEW WEEKS. SEEMS TO BE SOMETHING GOING ON IN THE ENGINE ITSELF OR POSSIBLE THE AC COMPRESSOR. TRUCK HAS 42,450 MILES
Power train, Electronic stability control (ESC), Mar 7, 2020
SERVICE STABILATRACT COMES ON BEFORE I START THE TRUCK STILL SINCE THE DAY I BOUGHT IT THE DEALERSHIP DOES NOT KNOW WHAT'S WRONG. AND SINCE I BOUGHT THE TRUCK THE TRANNY REALLY BANGS AND CLUNKS A LOT IT'S ANNOYING WHEN TRYING TO DRIVE IN STOP AND GO TRAFFIC IT GEAR CHASES WAY TO MUCH. IT CAN'T BE GOOD FOR THE TRANNY LIFE.
Power train, Jan 14, 2020
TL* THE CONTACT OWNS A 2018 CHEVROLET SILVERADO. THE CONTACT STATED THAT WHILE DRIVING, THE TRANSMISSION WOULD OVERHEAT. THE AIR CONDITIONER WAS NOT WORKING AND THE FANS WERE RUNNING. THE VEHICLE HAD A LOAD JERK AND THE TRANSMISSION KEEP REEVING HIGH EVEN AFTER HE HAD TAKEN HIS FOOT OFF THE ACCELERATOR. THE VEHICLE WAS TAKEN TO THE DEALER. STARLING CHEVROLET BUICK GMC (1001 E IRLO BRONSON MEMORIAL HWY, ST CLOUD, FL 34769 (407) 593-8957) WHERE THE AIR CONDITIONER SYSTEM WAS REPAIRED BUT THE ISSUE STILL PERSISTED. NO REPAIRS WERE PERFORMED ON THE TRANSMISSION. AN APPOINTMENT WAS MADE FOR ANOTHER DIAGNOSTIC TESTING. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 13,000.
Power train, Dec 19, 2019
TRANSMISSION SLIPS, TRANSMISSION DOWNSHIFTS HARD, TRANSMISSION WILL HAVE A LOUD THUD WHEN REENGAGING AFTER TAKING FOOT OFF GAS PEDAL IN STOP AND GO TRAFFIC, ESPECIALLY ON THE EXPRESSWAY. THUD CAN BE FELT IN THE CAB OF THE TRUCK. ELECTRONIC 4 WHEEL DRIVE GRINDS WHEN ENGAGED IN MOTION. 4 WHEEL DRIVE GRINDS WHEN TURNING EVEN THE SLIGHTEST BIT. UPON FIRST STARTING VEHICLE TRANSMISSION HESITATES UNTIL TEMP REACHES 125 DEGREES AT LEAST.