What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer communications
17Original wording in English
CHEVROLET, GMC
Reported code forms P2635
This Preliminary information communicates Some customers may comment that the SES lamp is illuminated or was Illuminated and turned off, with no driveabilty concerns. During inspection Technician may notice DTC P2635.…
CHEVROLET, GMC
Reported code forms P2635
This Preliminary information communicates Some customers may comment that the SES lamp is illuminated or was Illuminated and turned off, with no driveabilty concerns. During inspection Technician may notice DTC P2635.…
CADILLAC, CHEVROLET, GMC
Reported code forms P2635
Malfunction Indicator Lamp Illuminated (MIL) - DTC P2635 and/or P018B Set In High Ambient Temperatures With Hesitation, Surging and Stalling Condition Some customers may comment that the Malfunction Indicator Light…
CHEVROLET, GMC
Reported code forms P2635
This Preliminary information communicates Some customers may comment that the SES lamp is illuminated or was Illuminated and turned off, with no driveabilty concerns. During inspection Technician may notice DTC P2635.…
CHEVROLET, GMC
Reported code forms P2635
This Bulletin provides information to correct a customer concern of a siren or whine noise from the in-tank fuel pump at temperatures below -6C or 20F, accompanied by start and stall, no start, loss of power and MIL…
CADILLAC, CHEVROLET, GMC
Reported code forms P2635
This Preliminary Information communication provides information to the technician for a vehicle setting both a P2635 and P018B diagnostic trouble codes. The following steps may help to determine if this is caused by a…
Check vehicle applicability
8A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| GMC | SIERRA 1500 | 2021 |
| GMC | SIERRA 1500 | 2020 |
| GMC | SIERRA 1500 | 2019 |
| GMC | SIERRA 1500 | 2018 |
| GMC | SIERRA 1500 | 2017 |
| GMC | SIERRA 1500 | 2016 |
| GMC | SIERRA 1500 | 2015 |
| GMC | SIERRA 1500 | 2014 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.