The 2019 Sierra 1500 T1 platform is solid overall, but the 5.3L V8 has catastrophic lifter/DFM failures, the 8-speed transmission runs weak oil coolers, and the 3.0L Duramax suffers early emissions system headaches. The 6.2L is the most reliable powertrain if you can find one.
5.3L V8 AFM/DFM Lifter Failure Leading to Catastrophic Engine Damage
Common · high severity
Typical onset: 40,000-80,000 mi
Symptoms: Ticking or knocking noise on cold start that may disappear when warm, Check engine light with misfire codes (P0300-P0308), Sudden loss of power or rough idle, Metal shavings in oil, oil pressure warning light in severe cases
Fix: The Gen V 5.3L with Dynamic Fuel Management is notorious for lifter roller wheel failure. The lifter disintegrates, sending debris through the engine—destroys cam lobes, scores cylinder walls, clogs oil passages. Proper fix requires complete engine teardown or replacement, not just lifter swap. 25-35 hours labor for engine removal, teardown, machine work, and reassembly. Many shops now quote short-block or reman long-block swaps to avoid comebacks.
Estimated cost: $6,500-12,000
8L90 Transmission Oil Cooler Line Leaks and Cooler Failure
Common · medium severity
Typical onset: 60,000-100,000 mi
Symptoms: Transmission fluid puddles under vehicle, often passenger side, Low fluid warning or slipping gears, Pink or red fluid visible near radiator area, Overheating transmission, especially when towing
Fix: The quick-connect fittings on the trans cooler lines crack or leak where they meet the cooler block. The auxiliary cooler itself also fails prematurely. Line replacement is 2-3 hours, but full cooler replacement involves bumper removal and adds another 2 hours. Many techs now replace lines and cooler together preventively once one fails. Flush system and verify no cross-contamination if caught late.
Estimated cost: $800-1,800
3.0L Duramax DEF System and Emissions Failures
Occasional · high severity
Typical onset: 30,000-70,000 mi
Symptoms: Check engine light with P20EE, P20B9, P204F codes (DEF/SCR related), Speed limited to 65 mph or derate warnings on dash, DEF quality or level warnings despite full tank, Rough idle or reduced power under load
Fix: The LM2 Duramax has chronic DEF injector, NOx sensor, and SCR catalyst issues. DEF injector replacement alone is 3-4 hours due to poor access. SCR catalyst failures require full exhaust system work, 6-8 hours. Reductant heater and lines also fail in cold climates. GM issued software updates but hardware fails regardless. Some trucks need multiple repairs in first 60k miles.
Estimated cost: $1,200-4,500
Rear Main Seal and Oil Pan Gasket Leaks
Occasional · medium severity
Typical onset: 70,000-120,000 mi
Symptoms: Oil spots on driveway, centered or slightly rear of oil pan, Oil coating on transmission bellhousing or starter area, Low oil level between changes, No visible external leaks from valve covers or front timing cover
Fix: Both the rear main seal and oil pan gasket leak on these trucks. Rear main requires transmission removal—8-10 hours labor. Oil pan gasket needs crossmember drop and exhaust work, 5-6 hours. If doing rear main, smart to do oil pan gasket simultaneously since access is there. Use OEM gaskets; aftermarket ones leak within 20k miles.
Estimated cost: $1,200-2,800
Brake Booster Vacuum Pump Failure (5.3L and 6.2L)
Occasional · high severity
Typical onset: 50,000-90,000 mi
Symptoms: Hard brake pedal requiring excessive effort to stop, Hissing noise from engine bay near firewall, Brake warning light or reduced braking assist message, May be intermittent when cold then worsen
Fix: The electric vacuum pump for the brake booster fails, leaving you with manual brakes only—extremely dangerous in a 5,000+ lb truck. Pump is mounted on firewall, 2-3 hours labor for replacement. Covered under recall 20V490 for some VINs, but many fall outside range. Check for TSB updates. Do not drive the truck if pedal is hard.
Estimated cost: $600-1,200
Transmission Mount Failure and Driveline Vibration
Common · low severity
Typical onset: 40,000-80,000 mi
Symptoms: Clunk when shifting from Park to Drive or Reverse, Vibration at highway speeds that feels transmission-related, Excessive movement visible when engine rocks at idle in gear, Rattling over bumps from transmission tunnel area
Fix: The transmission crossmember mount deteriorates quickly—rubber separates or tears. Causes harsh shift engagement and driveline angles to change, which accelerates U-joint wear. Replacement is straightforward, 1.5-2 hours including driveshaft rebalance check. Use GM OEM mount; aftermarket ones last 20k miles max. Inspect U-joints simultaneously.
Estimated cost: $300-600
Owner tips
If buying a 5.3L V8, budget for AFM/DFM delete kit ($1,500-2,500 installed) or lifter insurance—failure is when, not if
Change transmission fluid every 40k miles regardless of GM 'lifetime' claim; filter and pan drop service is cheap insurance
On 3.0L Duramax, use only top-tier DEF and keep tank above 1/4 full year-round to prevent heater/injector crystallization
Inspect transmission cooler lines annually after 50k miles—catching a seep early saves the transmission
Avoid extended idle time with 5.3L V8; DFM cycling at idle accelerates lifter wear
Buy the 6.2L if you can afford the fuel; avoid the 5.3L unless AFM/DFM is already deleted; the 3.0L Duramax is a gamble best left to warranty holders.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
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General Motors (GM) is recalling certain 2019-2021 GMC Sierra 1500 and Silverado 1500 vehicles equipped with certain accessory road tires and a 17" spare tire. The 17" spare tire provided with the vehicle is not compatible for use with the accessory wheels, which can cause the anti-lock brake system (ABS) to not function properly under certain conditions.
Consequence: An ABS system that does not function properly can increase the risk of a crash.
Remedy: Dealers will provide a new 17" spare tire and wheel assembly that is compatible with the accessory wheels, free of charge. Dealers will also apply a new spare tire information label, and provide owners with an owner's manual insert clarifying which spare tire to use with the accessory road tires and with the 17" original tires. Owner notification letters were mailed February 7, 2022. Owners may contact GM customer service at 1-800-462-8782 or GMC customer service at 1-800-462-8782. GM's number for this recall is N212346510.
TIRES · 21V423000
2021-06-03
General Motors, LLC (GM) is recalling certain 2019 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles. The affected tires were cured for too long during production.
Consequence: Over cured tires may develop a break in the sidewall resulting in sudden air loss or a belt edge separation which could lead to a tread/belt loss. Either condition can cause a loss of vehicle control, increasing the risk of a crash.
Remedy: Dealers inspect and replace the tires as necessary, free of charge, free of charge. Owner notification letters were mailed on June 25, 2021. Owners may contact Chevrolet customer service at 1-800-222-1020 and GMC customer service at 1-800-462-8782. GM's number for this recall is N212336230.
TIRES · 21V115000
2021-02-25
General Motors LLC (GM) is recalling certain 2020 Buick Enclave, Cadillac XT4, XT5, Escalade, Escalade ESV, Chevrolet Suburban, Tahoe, Traverse, GMC Yukon, Yukon XL, 2018-2021 Chevrolet Express, GMC Savana, 2019-2020 Chevrolet Blazer, Silverado 1500, GMC Acadia, Sierra 1500, and certain Continental tires sold to the aftermarket for various model year 2018-2021 vehicles. The affected tires were cured for too long during production.
Consequence: Over cured tires may develop a break in the sidewall resulting in sudden air loss or a belt edge separation which could lead to a tread/belt loss. Either condition can cause a loss of vehicle control, increasing the risk of a crash.
Remedy: GM will notify owners, and dealers will inspect the tires, replacing them as necessary, free of charge. The recall began March 22, 2021. Owners may contact GMC customer service at 1-888-988-7267, Buick customer service at 1-866-608-8080, Chevrolet customer service at 1-800-222-1020 or Cadillac customer service at 1-800-458-8006. GM's number for this recall is N212329050.
SEAT BELTS · 20V792000
2020-12-17
General Motors, LLC (GM) is recalling certain 2019-2021 Chevrolet Silverado 1500 and GMC Sierra 1500, 2021 Chevrolet Suburban and Tahoe and GMC Yukon XL and 2020-2021 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles. The seat belt brackets may not be secured to the seat frame in the front-row center seating position.
Consequence: If a seat-belt bracket is not secured, the seat belt may not properly restrain an occupant in the front-row center seat position, increasing the risk of injury in a crash.
Remedy: GM will notify owners, and dealers will inspect left-side and right-side front-row center seat-belt bracket attachments and reassemble it correctly as necessary, free of charge. The recall began January 26, 2021. Owners may contact GMC customer service at 1-800-462-8782, Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N202314670.
POWER TRAIN:DRIVELINE:DRIVESHAFT · 20V650000
2020-10-22
General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500 and 2020 Chevrolet Silverado 2500 trucks. One of the driveshaft joints may not have been properly welded, causing the driveshaft to separate while the vehicle is moving.
Consequence: If the driveshaft separates, there may be a loss of propulsion, increasing the risk of crash.
Remedy: GM will notify owners, and dealers will replace the driveshaft, free of charge. The recall is expected to begin December 2020. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-888-988-7267. GM's number for this recall is N202314870.
SERVICE BRAKES, HYDRAULIC:POWER ASSIST · 20V055000
2020-01-30
General Motors LLC (GM) is recalling certain 2019 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles. These vehicles received updated software for the Electronic Brake Control Module (EBCM). This software has an error, and as a result, the vehicle's electronic brake assist may be disabled. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 126, "Electronic Stability Control" and 135, "Light Vehicle Brake Systems."
Consequence: A loss of electronic brake assist can increase the risk of a crash.
Remedy: GM will notify owners, and dealers will reprogram the EBCM, free of charge. The recall began February 24, 2020. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-888-988-7267. GM's number for this recall is N192268091.
General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks. The battery positive (B+) cable rings may have been manufactured with excessive glue, potentially causing an intermittent electrical connection between the B+ cable and alternator.
Consequence: An intermittent electrical connection between the B+ battery cable and the alternator could cause the vehicle to stall, increasing the risk of a crash. The intermittent connection could also lead to electrical arcing, which could generate sufficient heat to damage surrounding material, increasing the risk of a fire.
Remedy: GM will notify owners, and dealers will inspect for the presence of glue or other contamination at the B+ cable attachment to the alternator and clean the connection and reattach the B+ cable connection, as necessary. If arcing has damaged the cable, nut, or alternator, the dealer will replace the damaged components. All services will be performed free of charge. GM issued owners an interim notification on February 4, 2020. GM issued second notice and the recall began March 9, 2019. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-888-988-7267. GM's number for this recall is N192273510.
SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT · 19V889000
2019-12-12
General Motors LLC (GM) is recalling certain 2019 Chevrolet Silverado 1500, Cadillac CT6, and GMC Sierra 1500 vehicles. Due to an Electronic Brake Control Module (EBCM) software error, the vehicle's Electronic Stability Control (ESC) and Antilock Brake System (ABS) may become disabled. Furthermore, if this specific error occurs, the vehicle's diagnostics will not illuminate the instrument cluster ESC and ABS malfunction warning lights. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 126, "Electronic Stability Control" and 135, "Light Vehicle Brake Systems."
Consequence: If the driver operates the vehicle unaware that ESC and ABS are not functioning, there is an increased risk of a crash.
Remedy: GM will notify owners, and dealers will reprogram the EBCM, free of charge. The recall began February 4, 2020. Owners may contact Chevrolet customer service at 1-800-222-1020, Cadillac customer service at 1-800-333-4223, or GMC customer service at 1-888-988-7267. GM's number for this recall is N192268090.
SEAT BELTS:PRETENSIONER · 19V814000
2019-11-14
General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500, and 2020 Silverado 2500, Silverado 3500, Sierra 2500, and Sierra 3500 vehicles equipped with carpet floor covering. When the front seat belt pretensioners deploy, hot gas may vent through an opening in the pretensioner bracket, possibly igniting the carpet.
Consequence: A vehicle fire could result if materials ignite inside the vehicle.
Remedy: GM will notify owners, and dealers will close off the opening in the pretensioner bracket, free of charge. The recall began December 13, 2019. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-888-988-7267. GM's number for this recall is N192270600.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE · 18V868000
2018-12-06
General Motors LLC (GM) is recalling certain 2019 Chevrolet Silverado 1500 Crew Cab and GMC Sierra 1500 Crew Cab vehicles. The passenger-side frontal air bag module may have been damaged during assembly, possibly resulting in the air bag not inflating properly in the event of a crash.
Consequence: In the event of a crash, an air bag that does not inflate properly can increase the risk of injury.
Remedy: GM will notify owners, and dealers will replace the passenger side air bag module, free of charge. The recall began on December 18, 2018. Owners may contact Chevrolet customer service at 1-800-222-1020 and GMC customer service at 1-800-462-8782. GM's number for this recall is N182198820.
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