NHTSA service bulletin

NHTSA Service Bulletin 10028831: 2005-2008 Chevrolet 9-7x

Official manufacturer communication context for 2005-2008 Chevrolet 9-7x, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.

NHTSA service bulletin 10028831 summary graphic for 2005-2008 Chevrolet 9-7x
10028831NHTSA document ID
Manufacturer communicationcommunication type
55affected product rows
90/100quality score

Reviewed June 2026 from NHTSA manufacturer communication and service bulletin records. Carchieve is independent and not affiliated with any vehicle manufacturer or government agency.

Quick answer

GENERAL MOTORS: INTERMITTENT MIL/SES/ DTC P2138 WITH REDUCED ENGINE POWER (REPAIR INSTRUMENT PANEL (IP) TO BODY HARNESS CONNECTOR). 2005-08 GM PASSENGERS CARS/LIGHT DUTY TRUCKS (INCL. SATURNS). *PE UPDATED 11/5/10. *PE UPDATED 4/4/11. *PE UPDATED 2/3/16. *PE

What this bulletin may mean before buying

Treat this as service research, not a verdict on one car. Before you buy, compare this communication with official recall campaigns, model-level owner complaint patterns, and the exact vehicle’s VIN-decoded specifications. A bulletin can help you ask a seller or dealer sharper questions about software updates, known repairs, warranty extensions and service history.

Affected products listed in this communication

MakeModelModel yearsBuyer note
ChevroletAvalanche 15002005, 2006Ask for service records and run the exact VIN before purchase.
GMCAcadia2007, 2008Ask for service records and run the exact VIN before purchase.
GMCC45002008Ask for service records and run the exact VIN before purchase.
GMCC55002006, 2008Ask for service records and run the exact VIN before purchase.
GMCCanyon2005-2008Ask for service records and run the exact VIN before purchase.
GMCEnvoy2005, 2006, 2008Ask for service records and run the exact VIN before purchase.
GMCEnvoy 3602005-2008Ask for service records and run the exact VIN before purchase.
GMCEnvoy Denali2006Ask for service records and run the exact VIN before purchase.
GMCEnvoy Denali Xl2006Ask for service records and run the exact VIN before purchase.
GMCEnvoy Xl2006Ask for service records and run the exact VIN before purchase.
GMCEnvoy Xl 3702005, 2006Ask for service records and run the exact VIN before purchase.
GMCEnvoy Xuv2005Ask for service records and run the exact VIN before purchase.
GMCJimmy Classic2005Ask for service records and run the exact VIN before purchase.
GMCSafari (GMC)2005Ask for service records and run the exact VIN before purchase.
GMCSafari2005Ask for service records and run the exact VIN before purchase.
GMCSavana 15002005-2008Ask for service records and run the exact VIN before purchase.
GMCSavana2005-2008Ask for service records and run the exact VIN before purchase.
GMCSavana 25002005-2008Ask for service records and run the exact VIN before purchase.

Buyer checklist

  1. Run the 17-character VIN and confirm the year, make, model, engine and equipment match the listing.
  2. Check recall campaign pages for safety actions that may require dealer repair.
  3. Compare this bulletin with common problem pages for the same model and component area.
  4. Ask the seller or dealer whether the bulletin procedure, update or inspection has already been completed.
  5. Use the used-car buying checklist and get an independent inspection.

Frequently asked questions

What is NHTSA service bulletin 10028831?

GENERAL MOTORS: INTERMITTENT MIL/SES/ DTC P2138 WITH REDUCED ENGINE POWER (REPAIR INSTRUMENT PANEL (IP) TO BODY HARNESS CONNECTOR). 2005-08 GM PASSENGERS CARS/LIGHT DUTY TRUCKS (INCL. SATURNS). *PE UPDATED 11/5/10. *PE UPDATED 4/4/11. *PE UPDATED 2/3/16. *PE

Is a service bulletin the same as a recall?

No. A recall is a safety campaign with a required remedy for affected VINs. A service bulletin or manufacturer communication usually describes diagnostic, repair, software, warranty or service information.

How should a used-car buyer use this bulletin?

Use it as a research signal. Compare it with recalls, owner complaints, service records, a VIN report and an independent inspection before buying.

Check the exact VIN before you buy

Model-level pages show public safety patterns. A full VIN report helps confirm the exact vehicle, decoded specs, recall applicability and buyer checks.

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