NHTSA ID Number: 10162136
Manufacturer Communication Number: PIP5286B
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 fuel pressure sensor not reading the low end of the pressure range. Technician is to make sure the engine is cold and install the Multiple Diagnostic Interface along with Global Diagnostic System 2. Navigate to fuel system depressurize and at engine idle depressurize the fuel system. The fuel pressure sensor value should drop to 0 and the engine will stall. If a sensor is causing this concern the suspected sensor will not drop to 0 the engine will stall however the sensor will still read 30 to 40 pounds per square inch.
54 Affected Products
Bulletin No.: PIP5286B
Published date: 06/17/2019
PIP5286B Diagnostic Information For DTC P2635 With P018B
Brand: Model: Model Years:
Cadillac Escalade 2015 – 2019 All All 6.2L L86 All
Chevrolet Silverado 2014 – 2018 All All 4.3L LV3 5.3L L83 6.2L L86 All
Chevrolet Silverado LD 1500 2019 All All 4.3L LV3 5.3L L83 6.2L L86 All
Chevrolet Suburban 2015 – 2019 All All 5.3L L83 All
Chevrolet Tahoe 2015 – 2019 All All 5.3L L83 All
GMC Sierra 2014 – 2018 All All 4.3L LV3 5.3L L83 6.2L L86 All
GMC Sierra limited 1500 2019 All All 4.3L LV3 5.3L L83 6.2L L86 All
GMC Yukon Models 2015 – 2019 All All 5.3L L83 6.2L L86 All
This PI was superseded to edit model list and update model years. Please discard PIP5286A.
Condition / Concern
For a vehicle setting both P2635 and P018B the tip below may be helpful in determining if the condition may be caused by a fuel pressure sensor which is not reading the low end of the pressure range.
Recommendations / Instructions
A quick test to see if the fuel pressure sensor is the concern:
· Engine must be cold!
· Set up GDS/MDI
· Navigate to Fuel System Depressurize
· Engine at idle – depressurize fuel system
· Fuel pressure sensor value should drop to Zero and engine will stall
· Suspect sensors will not drop to zero but rather the engine will stall and the sensor will still read 30-40 PSI
NOTE: If the engine is warm/hot heat will expand the fuel in the system causing the pressure to stay up. The engine will continue to run much longer and the sensor value will not go to zero.
NOTE: The fuel pressure O-Ring seal is not included with the sensor and must be ordered separately.
Labor Operation Description Labor Time
4081828* Test Fuel Pressure Sensor 0.2 hr
* This is a unique labor operation for bulletin use only.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is
resolved without completing every step, the remaining steps do not need to be performed.
Bulletin No.: PIP5286B
Published date: 06/17/2019
Bulletin No.: PIP5286
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Last update on 2021-01-19 / Affiliate links / Images from Amazon Product Advertising API
Last update on 2021-01-19 / Affiliate links / Images from Amazon Product Advertising API