Are you having engine problems with your GM vehicle. One cause may be engine issues covered by a recent service bulletin.

1. Identification: Engine codes help identify specific issues within the vehicle’s engine or transmission system, allowing for targeted diagnostics and repairs [2].
2. Troubleshooting: These codes provide valuable information to mechanics or car owners about potential problems, helping to address issues promptly and prevent further damage [1].
3. Diagnostic Tool: Engine codes are essential for the On-Board Diagnostic (OBD-II) system, enabling vehicles to monitor and regulate various functions, including emissions and engine performance [3].
4. Indicator: The check engine light illuminates when the vehicle’s computer detects a problem, often accompanied by an engine code, signaling the need for attention [5].

Owners of Escalade, Sierra, and other model may experience these concerns: No Start, No Crank, Engine runs rough–Reduced engine power, Erratic speedometer operation,


Engine Codes Meaning

Engine Runs Rough, Stalls, Reduced engine power, DTC Codes, Wire Harness Chafing, Warning Message SES, Check
Engine Codes Displayed The following codes may be found:
C15AA, P001A P2B00, P2B01, P2B03, P2B96, P001BP003D P0107 P018C P01E5 P01E6 P01E7
P0237 P0340, P0341, P0355, P0365, P037, CP03, F0P0521, P0480, P0522, P0532, P0606

Engine Codes Meaning:

1. P001A: This code indicates an issue with the ‘A’ Camshaft Profile Control Circuit/Open (Bank 1) [1][2].
2. P2B00: This code seems to be manufacturer-specific and might not directly relate to emissions. Further diagnosis or consulting manufacturer-specific resources is necessary to determine the exact meaning [6].
3. P2B01: Similar to P2B00, this code is likely manufacturer-specific and may not be directly related to emissions. Consulting manufacturer resources or performing further diagnostics is needed to interpret its exact meaning [6].
4. P2B03: Like P2B00 and P2B01, this code is also manufacturer-specific and may not directly relate to emissions. Additional diagnostics or consulting manufacturer-specific resources is necessary for an accurate interpretation [6].

Vehicles Covered by Service Bulletin

Cadillac Escalade Models 2021 2023 Equipped with 5.3L L84andL87,2.7L L3Bor3.0LLM2
Chevrolet Silverado 1500 2020 2021
Suburban 2021 2023 Equipped with 5.3L
Yukon Models 2021 2023

Lemon Law, Class Action and Warranty Claims

If you had repeated problems with a vehicle that the dealer was unable to correct, you may be entitled to a refund, new vehicle, or compensation. Showing service bulletins is one way to document a claim, here are some others:

Proving an automobile defect typically involves gathering evidence and presenting it in a compelling manner. Here are several ways to prove an automobile defect:

1. Expert Opinion: Expert witnesses, such as automotive engineers or mechanics, can examine the vehicle and provide testimony regarding any defects they find. Their professional opinion can carry significant weight in court.
2. Documentation: Any documentation related to the vehicle, such as repair records, maintenance logs, and manufacturer communications, can be crucial in demonstrating a pattern of issues or negligence on the part of the manufacturer.
3. Recalls and Technical Service Bulletins (TSBs): If the defect is widespread, there may be recalls or TSBs issued by the manufacturer addressing the problem. Providing evidence of these can strengthen your case.
4. Photographic Evidence: Clear photographs or videos of the defect, damage caused by the defect, or relevant vehicle components can be compelling evidence in court.
5. Witness Testimony: Eyewitnesses to accidents caused by the defect or individuals who have experienced similar issues with the same make and model of vehicle can provide valuable testimony.
6. Data and Black Box Analysis: Many modern vehicles are equipped with event data recorders (EDRs), commonly known as black boxes. Analysis of the data from these devices can provide insight into the vehicle’s performance leading up to an accident and help establish any defects.
7. Expert Reports and Testing: Independent testing and reports conducted by experts can provide scientific evidence of defects and their impact on the vehicle’s safety and performance.
8. Manufacturer Documents: Internal documents from the manufacturer, such as emails, memos, or design specifications, that indicate awareness of the defect or discussions about its potential impact can be compelling evidence.

It’s important to work with an experienced attorney who specializes in product liability or automotive defects to ensure you gather the necessary evidence and present your case effectively.