| 2024 | Caution | 6 | The automatic emergency braking and forward-collision system activates unexpectedly with no obstacle present, causing sudden deceleration at speed and a rear-collision risk.; Sudden loss of motive power and transmission limp-mode in the 8-speed automatic, with total acceleration failure reported between roughly 39,000 and 52,000 miles.; Brake pedal sinks to the floor or becomes unresponsive, in some cases at very low mileage, with at least one crash and injury reported. | Full report ↗ |
| 2023 | Caution | 6 | The automatic emergency braking and forward-collision system activates unexpectedly with no obstacle present, causing sudden deceleration at speed and a rear-collision risk.; Sudden loss of motive power and transmission limp-mode in the 8-speed automatic, with total acceleration failure reported between roughly 39,000 and 52,000 miles.; Brake pedal sinks to the floor or becomes unresponsive, in some cases at very low mileage, with at least one crash and injury reported. | Full report ↗ |
| 2022 | Caution | 6 | Brake-booster vacuum pump fails, causing a hard pedal and reduced stopping power; dealers describe it as a known Colorado issue and the failure can also damage the engine.; The 8-speed automatic shudders and vibrates under light acceleration (often 30-70 mph), described as driving over rumble strips; GM TSB 18-NA-355 prescribes heavier transmission fluid with mixed results. Torque-converter related.; Engine wiring harness chafes against the block and shorts, causing electrical faults such as warning lights, wipers or lights activating on their own and even steering lock-up (TSB PIT5626D). | Full report ↗ |
| 2021 | Caution | 6 | Brake-booster vacuum pump fails, causing a hard pedal and reduced stopping power; dealers describe it as a known Colorado issue and the failure can also damage the engine.; The 8-speed automatic shudders and vibrates under light acceleration (often 30-70 mph), described as driving over rumble strips; GM TSB 18-NA-355 prescribes heavier transmission fluid with mixed results. Torque-converter related.; Engine wiring harness chafes against the block and shorts, causing electrical faults such as warning lights, wipers or lights activating on their own and even steering lock-up (TSB PIT5626D). | Full report ↗ |
| 2020 | Caution | 6 | Brake-booster vacuum pump fails, causing a hard pedal and reduced stopping power; dealers describe it as a known Colorado issue and the failure can also damage the engine.; The 8-speed automatic shudders and vibrates under light acceleration (often 30-70 mph), described as driving over rumble strips; GM TSB 18-NA-355 prescribes heavier transmission fluid with mixed results. Torque-converter related.; Engine wiring harness chafes against the block and shorts, causing electrical faults such as warning lights, wipers or lights activating on their own and even steering lock-up (TSB PIT5626D). | Full report ↗ |
| 2019 | Caution | 6 | Brake-booster vacuum pump fails, causing a hard pedal and reduced stopping power; dealers describe it as a known Colorado issue and the failure can also damage the engine.; The 8-speed automatic shudders and vibrates under light acceleration (often 30-70 mph), described as driving over rumble strips; GM TSB 18-NA-355 prescribes heavier transmission fluid with mixed results. Torque-converter related.; Engine wiring harness chafes against the block and shorts, causing electrical faults such as warning lights, wipers or lights activating on their own and even steering lock-up (TSB PIT5626D). | Full report ↗ |
| 2012 | Caution | 6 | Passlock/anti-theft system intermittently disables engine starting; owners must wait 10-15 minutes for it to reset before the truck will crank. A chronic, widespread GMT355-era complaint that GM never recalled.; Wiring harness in the extended-cab door breaks from repeated door cycling, triggering airbag and seat-belt-tensioner warning lights and disabling those systems. | Full report ↗ |
| 2011 | Caution | 6 | Passlock/anti-theft system intermittently disables engine starting; owners must wait 10-15 minutes for it to reset before the truck will crank. A chronic, widespread GMT355-era complaint that GM never recalled.; Wiring harness in the extended-cab door breaks from repeated door cycling, triggering airbag and seat-belt-tensioner warning lights and disabling those systems. | Full report ↗ |
| 2010 | Caution | 6 | Passlock/anti-theft system intermittently disables engine starting; owners must wait 10-15 minutes for it to reset before the truck will crank. A chronic, widespread GMT355-era complaint that GM never recalled.; Heater blower-motor resistor and connector overheat and melt, a documented fire hazard with flames reported at the floorboard.; Wiring harness in the extended-cab door breaks from repeated door cycling, triggering airbag and seat-belt-tensioner warning lights and disabling those systems. | Full report ↗ |
| 2009 | Caution | 6 | Passlock/anti-theft system intermittently disables engine starting; owners must wait 10-15 minutes for it to reset before the truck will crank. A chronic, widespread GMT355-era complaint that GM never recalled.; Heater blower-motor resistor and connector overheat and melt, a documented fire hazard with flames reported at the floorboard.; Wiring harness in the extended-cab door breaks from repeated door cycling, triggering airbag and seat-belt-tensioner warning lights and disabling those systems. | Full report ↗ |
| 2018 | Caution | 5 | Brake-booster vacuum pump fails, causing a hard pedal and reduced stopping power; dealers describe it as a known Colorado issue and the failure can also damage the engine.; The 8-speed automatic shudders and vibrates under light acceleration (often 30-70 mph), described as driving over rumble strips; GM TSB 18-NA-355 prescribes heavier transmission fluid with mixed results. Torque-converter related.; Engine wiring harness chafes against the block and shorts, causing electrical faults such as warning lights, wipers or lights activating on their own and even steering lock-up (TSB PIT5626D). | Full report ↗ |
| 2017 | Caution | 5 | Brake-booster vacuum pump fails, causing a hard pedal and reduced stopping power; dealers describe it as a known Colorado issue and the failure can also damage the engine.; The 8-speed automatic shudders and vibrates under light acceleration (often 30-70 mph), described as driving over rumble strips; GM TSB 18-NA-355 prescribes heavier transmission fluid with mixed results. Torque-converter related.; Engine wiring harness chafes against the block and shorts, causing electrical faults such as warning lights, wipers or lights activating on their own and even steering lock-up (TSB PIT5626D). | Full report ↗ |
| 2016 | Caution | 5 | Electric power-steering assist fails suddenly with Service Power Steering and StabiliTrak warnings, leaving the wheel very heavy to turn; traced to the torque-sensor assembly. Recall 21V213000 covered 2015 but many 2016 VINs were excluded.; Some 3.6L V6 trucks develop engine misfire and intermittent stalling attributed to worn valve seats. | Full report ↗ |
| 2015 | Caution | 5 | Electric power-steering assist fails suddenly with Service Power Steering and StabiliTrak warnings, leaving the wheel very heavy to turn; traced to the torque-sensor assembly. Recall 21V213000 covered 2015 but many 2016 VINs were excluded. | Full report ↗ |
| 2008 | Caution | 5 | Passlock/anti-theft system intermittently disables engine starting; owners must wait 10-15 minutes for it to reset before the truck will crank. A chronic, widespread GMT355-era complaint that GM never recalled.; Premature frame and rear-subframe rust, with owners reporting holes and structural failure on relatively low-mileage salt-belt trucks; can render the truck unsafe or a total loss.; Heater blower-motor resistor and connector overheat and melt, a documented fire hazard with flames reported at the floorboard. | Full report ↗ |
| 2007 | Caution | 5 | Passlock/anti-theft system intermittently disables engine starting; owners must wait 10-15 minutes for it to reset before the truck will crank. A chronic, widespread GMT355-era complaint that GM never recalled.; Premature frame and rear-subframe rust, with owners reporting holes and structural failure on relatively low-mileage salt-belt trucks; can render the truck unsafe or a total loss.; Heater blower-motor resistor and connector overheat and melt, a documented fire hazard with flames reported at the floorboard. | Full report ↗ |
| 2006 | Caution | 5 | Passlock/anti-theft system intermittently disables engine starting; owners must wait 10-15 minutes for it to reset before the truck will crank. A chronic, widespread GMT355-era complaint that GM never recalled.; Premature frame and rear-subframe rust, with owners reporting holes and structural failure on relatively low-mileage salt-belt trucks; can render the truck unsafe or a total loss.; Heater blower-motor resistor and connector overheat and melt, a documented fire hazard with flames reported at the floorboard. | Full report ↗ |
| 2005 | Caution | 5 | Passlock/anti-theft system intermittently disables engine starting; owners must wait 10-15 minutes for it to reset before the truck will crank. A chronic, widespread GMT355-era complaint that GM never recalled.; Premature frame and rear-subframe rust, with owners reporting holes and structural failure on relatively low-mileage salt-belt trucks; can render the truck unsafe or a total loss.; Heater blower-motor resistor and connector overheat and melt, a documented fire hazard with flames reported at the floorboard. | Full report ↗ |