TSB: CADILLAC ESCALADE, SIERRA, SIERRA 1500, SIERRA 3500, SILVERADO, SILVERADO 1500, SILVERADO 2500, SUBURBAN, TAHOE, YUKON, YUKON XL (2014–2018)

Bulletin PIP5427B — March 6, 2019

Bulletin Details

Bulletin IDPIP5427B
ManufacturerCADILLAC
ModelsESCALADE, SIERRA, SIERRA 1500, SIERRA 3500, SILVERADO, SILVERADO 1500, SILVERADO 2500, SUBURBAN, TAHOE, YUKON, YUKON XL
Model Years2014–2018
Date IssuedMarch 6, 2019
Date Added to NHTSAApril 8, 2019
ComponentENGINE (PWS)
Vehicles Affected60 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

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. Techn

Affected Vehicles

MakeModelYearComponent
CADILLAC ESCALADE 2018 060000 ENGINE (PWS)
CADILLAC ESCALADE 2018 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
GMC SIERRA 3500 2018 060000 ENGINE (PWS)
GMC SIERRA 3500 2018 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CHEVROLET SILVERADO 2500 2018 060000 ENGINE (PWS)
CHEVROLET SILVERADO 2500 2018 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CHEVROLET SUBURBAN 2018 060000 ENGINE (PWS)
CHEVROLET SUBURBAN 2018 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CHEVROLET TAHOE 2018 060000 ENGINE (PWS)
CHEVROLET TAHOE 2018 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
GMC YUKON 2018 060000 ENGINE (PWS)
GMC YUKON 2018 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
GMC YUKON XL 2018 060000 ENGINE (PWS)
GMC YUKON XL 2018 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CADILLAC ESCALADE 2017 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CADILLAC ESCALADE 2017 060000 ENGINE (PWS)
GMC SIERRA 2017 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
GMC SIERRA 2017 060000 ENGINE (PWS)
CHEVROLET SILVERADO 2017 060000 ENGINE (PWS)
CHEVROLET SILVERADO 2017 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CHEVROLET SUBURBAN 2017 060000 ENGINE (PWS)
CHEVROLET SUBURBAN 2017 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CHEVROLET TAHOE 2017 060000 ENGINE (PWS)
CHEVROLET TAHOE 2017 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
GMC YUKON 2017 060000 ENGINE (PWS)
GMC YUKON 2017 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
GMC YUKON XL 2017 060000 ENGINE (PWS)
GMC YUKON XL 2017 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CADILLAC ESCALADE 2016 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CADILLAC ESCALADE 2016 060000 ENGINE (PWS)
GMC SIERRA 1500 2016 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
GMC SIERRA 1500 2016 060000 ENGINE (PWS)
CHEVROLET SILVERADO 2500 2016 060000 ENGINE (PWS)
CHEVROLET SILVERADO 2500 2016 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CHEVROLET SUBURBAN 2016 060000 ENGINE (PWS)
CHEVROLET SUBURBAN 2016 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CHEVROLET TAHOE 2016 060000 ENGINE (PWS)
CHEVROLET TAHOE 2016 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
GMC YUKON 2016 060000 ENGINE (PWS)
GMC YUKON 2016 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
GMC YUKON XL 2016 060000 ENGINE (PWS)
GMC YUKON XL 2016 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CADILLAC ESCALADE 2015 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CADILLAC ESCALADE 2015 060000 ENGINE (PWS)
GMC SIERRA 1500 2015 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
GMC SIERRA 1500 2015 060000 ENGINE (PWS)
CHEVROLET SILVERADO 2500 2015 060000 ENGINE (PWS)
CHEVROLET SILVERADO 2500 2015 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CHEVROLET SUBURBAN 2015 060000 ENGINE (PWS)
CHEVROLET SUBURBAN 2015 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CHEVROLET TAHOE 2015 060000 ENGINE (PWS)
CHEVROLET TAHOE 2015 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
GMC YUKON 2015 060000 ENGINE (PWS)
GMC YUKON 2015 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
GMC YUKON XL 2015 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
GMC YUKON XL 2015 060000 ENGINE (PWS)
GMC SIERRA 1500 2014 060000 ENGINE (PWS)
GMC SIERRA 1500 2014 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CHEVROLET SILVERADO 1500 2014 060000 ENGINE (PWS)
CHEVROLET SILVERADO 1500 2014 091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES

Related CADILLAC Recalls

CampaignModelYearComponentSummary
ESCALADE 2026 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER ... General Motors has decided that certain 2027 Chevrolet Bolt EV, 2025-2026 Cad...
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CT5 2026 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER ... General Motors has decided that certain 2027 Chevrolet Bolt EV, 2025-2026 Cad...
ESCALADE IQ 2026 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER ... General Motors has decided that certain 2027 Chevrolet Bolt EV, 2025-2026 Cad...
LYRIQ 2026 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER ... General Motors has decided that certain 2027 Chevrolet Bolt EV, 2025-2026 Cad...

What Should You Do?

If your vehicle is affected by this TSB, contact your authorized CADILLAC dealer. Bring this bulletin ID (PIP5427B) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.