Vehicle reference
Chevrolet
GM bulletin guides for seven Chevrolet models: the Cruze, Malibu and Equinox, and the Silverado, Tahoe, Suburban and Avalanche. Choose the model, then check the year and engine coverage in the guide.
Coverage and bulletin details
The models split into two groups. Between them, the Cruze 1.4L, Malibu 1.5L LFV and Equinox 1.5L LYX have guides for P0299, P1101 and reduced engine power. The Silverado, Tahoe, Suburban and Avalanche share the EVAP guides for P0442, P0446 and P0455. The Cruze belongs to both groups, because bulletin 17-NA-233 covers P0446 on the 2016–2019 Cruze 1.4L LE2 and traces it to water trapped in the canister filter pipe.
Once the model is clear, choose the code and check the guide’s application table before reading on, because year and engine decide which GM document applies. Among the EVAP bulletins, 23-NA-073 covers the Silverado 1500 from the 2019 new model through 2023 and the Silverado 2500 HD/3500 HD from 2020 to 2024, for trucks that operate in extremely dusty environments. 09-06-04-028D covers the 2007–2010 Avalanche, Suburban 1500 and Tahoe. The P0442 and P0455 guides also draw on 21-NA-124, which covers GM gasoline vehicles from 2000 to 2021.
Chevrolet
Cruze
8 relevant guides
Chevy P0446: GM EVAP Vent Fixes for Silverado, Tahoe, Cruze
P0446 on a Chevy: GM bulletins tie it to dust in Silverado and Sierra canisters, water at the 2007–2010 Tahoe vent valve, and the Cruze 1.4L filter pipe.
Cruze P0299: causes to check before replacing the turbo
Questions to ask before approving a turbocharger assembly for a LUJ/LUV Cruze with an underboost complaint.
Cruze P0299 or P0234 in extreme cold: GM’s LE2 icing repair path
Use temperature, drive pattern and engine identification to assess whether GM bulletin 22-NA-007 is relevant.
Cruze P0299 and wastegate wear: when GM supports a repair
Separate an observation at the wastegate from a supported turbo replacement decision on LUJ/LUV engines.
Cruze P1101 after an air-filter change: baffle and PCV-pipe checks
Why the air-cleaner baffle belongs in the conversation on a 2011–2016 LUJ/LUV Cruze.
Cruze P1101 after a valve-cover replacement: the manifold PCV link
A source-based follow-up for a recurring P1101 or P0171 complaint on early LUJ/LUV Cruze engines.
Cruze P1101: meaning, causes and the right GM repair path
A guide to choosing the right GM diagnostic reference before ordering parts for a Cruze with P1101.
Cruze P1101 with an oil leak: GM’s LE2 pressure and PCV correction
The LE2 diagnostic branch to discuss before treating an oil seal as the whole repair.
Chevrolet
Malibu
2 relevant guides
Malibu P1101: charge-air leaks and the PCV pressure branch
What GM says about a disconnected charge-air tube on the 2018–2022 Malibu 1.5L LFV.
Chevy Malibu 2018–2022 1.5L: Reduced Engine Power and P0299
Reduced engine power or P0299 on a 2018–2022 Malibu 1.5L: what GM bulletin 22-NA-224 checks first, plus the PIP5402D coupler check.
Chevrolet
Equinox
2 relevant guides
Equinox & Terrain 2018–2022 1.5L P1101: Three GM Repair Paths
P1101 on a 2018–2022 Equinox or Terrain 1.5L LYX: GM ties it to a separated charge-air tube, a coupler O-ring or a plugged PCV orifice.
Equinox & Terrain 2018–2022 1.5L: Reduced Engine Power, P0299
Reduced engine power or P0299 on a 2018–2022 Equinox or Terrain 1.5L: GM bulletin 22-NA-224 points to a separated charge air cooler tube.
Chevrolet
Silverado
3 relevant guides
Chevy P0442 Small EVAP Leak: GM’s Seven Connections, 2000–2021
Code P0442 on a Chevy or other 2000–2021 GM gas vehicle: the seven connections in bulletin 21-NA-124, stuck-open valves, and two model bulletins.
Chevy P0446: GM EVAP Vent Fixes for Silverado, Tahoe, Cruze
P0446 on a Chevy: GM bulletins tie it to dust in Silverado and Sierra canisters, water at the 2007–2010 Tahoe vent valve, and the Cruze 1.4L filter pipe.
Chevy P0455: GM’s Large EVAP Leak Checks (2000–2021 Gas)
P0455 on a 2000–2021 GM gas vehicle: the four causes in GM bulletin 21-NA-124, the order they are checked, and two truck and SUV bulletins.
Chevrolet
Tahoe
3 relevant guides
Chevy P0442 Small EVAP Leak: GM’s Seven Connections, 2000–2021
Code P0442 on a Chevy or other 2000–2021 GM gas vehicle: the seven connections in bulletin 21-NA-124, stuck-open valves, and two model bulletins.
Chevy P0446: GM EVAP Vent Fixes for Silverado, Tahoe, Cruze
P0446 on a Chevy: GM bulletins tie it to dust in Silverado and Sierra canisters, water at the 2007–2010 Tahoe vent valve, and the Cruze 1.4L filter pipe.
Chevy P0455: GM’s Large EVAP Leak Checks (2000–2021 Gas)
P0455 on a 2000–2021 GM gas vehicle: the four causes in GM bulletin 21-NA-124, the order they are checked, and two truck and SUV bulletins.
Chevrolet
Suburban
3 relevant guides
Chevy P0442 Small EVAP Leak: GM’s Seven Connections, 2000–2021
Code P0442 on a Chevy or other 2000–2021 GM gas vehicle: the seven connections in bulletin 21-NA-124, stuck-open valves, and two model bulletins.
Chevy P0446: GM EVAP Vent Fixes for Silverado, Tahoe, Cruze
P0446 on a Chevy: GM bulletins tie it to dust in Silverado and Sierra canisters, water at the 2007–2010 Tahoe vent valve, and the Cruze 1.4L filter pipe.
Chevy P0455: GM’s Large EVAP Leak Checks (2000–2021 Gas)
P0455 on a 2000–2021 GM gas vehicle: the four causes in GM bulletin 21-NA-124, the order they are checked, and two truck and SUV bulletins.
Chevrolet
Avalanche
3 relevant guides
Chevy P0442 Small EVAP Leak: GM’s Seven Connections, 2000–2021
Code P0442 on a Chevy or other 2000–2021 GM gas vehicle: the seven connections in bulletin 21-NA-124, stuck-open valves, and two model bulletins.
Chevy P0446: GM EVAP Vent Fixes for Silverado, Tahoe, Cruze
P0446 on a Chevy: GM bulletins tie it to dust in Silverado and Sierra canisters, water at the 2007–2010 Tahoe vent valve, and the Cruze 1.4L filter pipe.
Chevy P0455: GM’s Large EVAP Leak Checks (2000–2021 Gas)
P0455 on a 2000–2021 GM gas vehicle: the four causes in GM bulletin 21-NA-124, the order they are checked, and two truck and SUV bulletins.