2018 GMC Sierra 1500 Problems: 8 Known Issues
2018 model year · 890+ owner reports · Updated November 2026
According to Au7o's analysis of 890+ owner reports, the 2018 GMC Sierra 1500 has 8 documented known issues, with 4 rated critical. The most serious are 8-Speed/10-Speed Transmission Torque Converter Shudder ($150-$4,500 repair), Unintended braking on one wheel after a wheel-speed sensor fails — recall 19V761, Harder brake pedal as the engine vacuum pump weakens — recall 19V645 and Misfire or ticking from a collapsed or stuck AFM lifter — bulletin 15-06-01-002O. The most commonly reported issue is 8-Speed/10-Speed Transmission Torque Converter Shudder with 890 owner reports. Across all issues with published estimates, repair costs range from $150 to $4,500. DIY maintenance guides at au7o.io.
2018 · All trims · 5.3L V8 (L83)
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All 8 Known Issues
NHTSA Recalls22 recalls
SERVICE BRAKES, HYDRAULIC:BRAKE FLUID LOW WARNING: LAMP
General Motors, LLC (GM) is recalling certain 2023 Chevrolet Silverado 1500, GMC Sierra 1500, 2023-2024 Chevrolet Tahoe, Suburban, GMC Yukon, Yukon XL, Cadillac Escalade, and Escalade ESV vehicles. The electronic brake control module software may fail to display a warning light when a loss of brake fluid occurs. As such, these vehicles fail to comply with the requirements of Federal Vehicle Safety Standard number 135, "Light Vehicle Brake Systems."
EXTERIOR LIGHTING:LIGHTING CONTROL MODULE:SOFTWARE
General Motors, LLC (GM) is recalling certain 2020-2023 Cadillac CT4 and CT5; 2021-2023 Buick Envision; and 2022-2023 Cadillac Escalade and Escalade ESV, Chevrolet Silverado 1500, Suburban, Tahoe, GMC Sierra 1500, Yukon, and Yukon XL vehicles. The daytime running lights (DRLs) may not deactivate when the headlights are on. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."
ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL
General Motors LLC (GM) is recalling certain 2021-2024 Cadillac Escalade and Escalade ESV, Chevrolet Silverado 1500, Suburban, and Tahoe, GMC Sierra 1500, Yukon, and Yukon XL vehicles equipped with a 6.2L V8 gas engine. The connecting rod and/or crankshaft engine components may have manufacturing defects that can lead to engine damage and engine failure.
SEAT BELTS
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.
SEAT BELTS
General Motors, LLC (GM) is recalling certain 2020 Chevrolet Bolt EV and 2021 GMC Canyon and Sierra 1500, 2500 and 3500, Yukon, Yukon XL, Cadillac Escalade and Escalade ESV and Chevrolet Blazer, Camaro, Colorado, Equinox, Silverado 1500, 2500 and 3500, Suburban and Tahoe vehicles. Incorrect bolts may have been used at one or more fastening locations to secure the seat belts to the vehicle. If an incorrect bolt was used, the seat belt may not be properly attached to the vehicle.
+ 17 more recalls. Check all on NHTSA.gov
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Frequently Asked Questions
What are the most common GMC Sierra 1500 problems?
According to Au7o's analysis of 890+ owner reports, the 2018 GMC Sierra 1500 has 8 documented issues. The most frequently reported are: 8-Speed/10-Speed Transmission Torque Converter Shudder, Unintended braking on one wheel after a wheel-speed sensor fails — recall 19V761, Harder brake pedal as the engine vacuum pump weakens — recall 19V645. Of these, 4 are rated critical and should be addressed promptly.
Is the GMC Sierra 1500 reliable?
The 2018 GMC Sierra 1500 has 8 known issues documented across 890+ owner reports. 4 issues are rated critical: 8-Speed/10-Speed Transmission Torque Converter Shudder and Unintended braking on one wheel after a wheel-speed sensor fails — recall 19V761 and Harder brake pedal as the engine vacuum pump weakens — recall 19V645 and Misfire or ticking from a collapsed or stuck AFM lifter — bulletin 15-06-01-002O. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common GMC Sierra 1500 problems?
Repair costs for known GMC Sierra 1500 issues range from $150 to $4,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, 8-Speed/10-Speed Transmission Torque Converter Shudder, typically costs $150-$4,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2015-2023 GMC Sierra 1500 8-Speed/10-Speed Transmission Torque Converter Shudder?
The 8L90 8-speed and 10L80/10L90 10-speed automatic transmissions experience shuddering during light throttle acceleration, particularly at highway speeds between 35-60 mph. The issue is caused by the torque converter lock-up clutch slipping and chattering. Harsh shifts between g… Repairs typically run $150-$4,500. Severity: high.
What is the 2014-2018 GMC Sierra 1500 Unintended braking on one wheel after a wheel-speed sensor fails — recall 19V761?
GM found that if a wheel-speed sensor fails, incorrect axle-ratio calibration in the electronic brake control module (EBCM) can activate the driveline-protection system while driving 41-60 mph in four-wheel drive or Auto mode, braking the wheel on the opposite side and pulling th… Severity: high.
What is the 2014-2018 GMC Sierra 1500 Harder brake pedal as the engine vacuum pump weakens — recall 19V645?
GM found that the engine-mounted mechanical vacuum pump's output may decrease over time, reducing power brake assist. GM says debris such as oil sludge can build up on the pump's oil filter screen; drivers may notice increased pedal effort, a hard pedal or a longer stopping dista… Severity: high.
What is the 2014-2019 GMC Sierra 1500 Misfire or ticking from a collapsed or stuck AFM lifter — bulletin 15-06-01-002O?
GM says a misfire, tick noise and check-engine light with P0300 may be caused by an Active Fuel Management lifter that is mechanically collapsed or stuck, internal locking-pin damage from oil aeration, a lifter collapsed and stuck in its bore, or a bent pushrod. 2014 GMC Sierra 1… Severity: high.
What is the 2014-2019 GMC Sierra 1500 Intermittent crank-no-start with P0011 from a sticking cam actuator solenoid — GM information PIP5130K?
GM tells technicians that the camshaft position actuator solenoid valve may stick or bind, holding the valve timing retarded, which can cause an intermittent crank-no-start with code P0011 and/or P00C6 stored. GM says the engine may sound like it is cranking fast and fuel rail pr… Severity: medium.
What is the 2014-2018 GMC Sierra 1500 P0430 catalyst code: check air-cleaner sealing before replacing parts — GM16-NA-111?
GM says sand or debris can enter the air filter box and bypass a poorly sealing air filter, damaging the oxygen sensor element and blocking the catalytic converter with sand and debris particles, which turns on the check-engine light with P0420 and/or P0430. 2014-2018 GMC Sierra… Severity: medium.
What is the 2014-2018 GMC Sierra 1500 Rough idle, misfire or hard starting from carbon on the valves — bulletin 16-NA-383?
GM says major carbon build-up on the intake and/or exhaust valves, from fuel contamination or incomplete burning of the fuel, can cause rough idle, extended crank, crank-no-start or misfire with codes P0300-P0308, and that valves may stick. 2014-2018 GMC Sierra 1500 gasoline engi… Severity: medium.
What is the 2014-2018 GMC Sierra 1500 Catalyst codes P0420/P0430 from dirt getting past the air filter seal — bulletin 16-NA-111?
GM says sand or debris can enter the air filter box and bypass a poorly sealing air filter, damaging the oxygen sensor element and blocking the catalytic converter with sand and debris particles, which turns on the check-engine light with P0420 and/or P0430. 2014-2018 GMC Sierra… Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.