# P2635 on the 2017 GMC Yukon XL

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

## Bulletins for this model year that name P2635

- [10156913](https://open.wenmarpro.com/bulletins/10156913), 2019-04-08: This Preliminary Information communication provides information to the technician about vehicle that may have a Service Engine Soon Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P2635, U0074 and or U18A2. Technician will need to follow published diagnostics for Diagnostic Trouble Codes U0074 would take priority over U18A2 if both set before addressing DTC P2635.
- [10137723](https://open.wenmarpro.com/bulletins/10137723), 2018-05-21: This Preliminary Information communication provides information to the technician about vehicle that may have a Service Engine Soon Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P2635, U0074 and or U18A2. Technician will need to follow published diagnostics for Diagnostic Trouble Codes U0074 would take priority over U18A2 if both set before addressing DTC P2635.
- [10118290](https://open.wenmarpro.com/bulletins/10118290), 2017-10-04: This Preliminary information communicatesIn ambient temperatures 100F \(37.7 C\)degrees or higher, DTCs P2635 and/or P018B may set.The vehicle may also exhibit a hesitation or stalling condition.Excessively Hot and sustained ambient temperatures over 100F \(37.7 C\) degrees Mainly in TX, AZ, UT, NV, CA, NM \(could be any state\) causingVapor buildup in fuel feed line.Customers can be advised to utilize fuels with octane levels greater than 91, Refrain from extended idleing periods if possible, park vehicles in covered garage.Replacing the fuel pump will not repare this concern.
- [10114082](https://open.wenmarpro.com/bulletins/10114082), 2017-08-15: This Preliminary information communicatesIn ambient temperatures 100F \(37.7 C\)degrees or higher, DTCs P2635 and/or P018B may set.The vehicle may also exhibit a hesitation or stalling condition.Excessively Hot and sustained ambient temperatures over 100F \(37.7 C\) degrees Mainly in TX, AZ, UT, NV, CA, NM \(could be any state\) causingVapor buildup in fuel feed line.Customers can be advised to utilize fuels with octane levels greater than 91, Refrain from extended idleing periods if possible, park vehicles in covered garage.Replacing the fuel pump will not repare this concern.
- [10114071](https://open.wenmarpro.com/bulletins/10114071), 2017-08-15: This Preliminary information communicatesIn ambient temperatures 100F \(37.7 C\)degrees or higher, DTCs P2635 and/or P018B may set.The vehicle may also exhibit a hesitation or stalling condition.Excessively Hot and sustained ambient temperatures over 100F \(37.7 C\) degrees Mainly in TX, AZ, UT, NV, CA, NM \(could be any state\) causingVapor buildup in fuel feed line.Customers can be advised to utilize fuels with octane levels greater than 91, Refrain from extended idleing periods if possible, park vehicles in covered garage.Replacing the fuel pump will not repare this concern.