NHTSA service bulletin

NHTSA Service Bulletin 10026693: 2008, 2009 Buick Acadia

Official manufacturer communication context for 2008, 2009 Buick Acadia, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.

NHTSA service bulletin 10026693 summary graphic for 2008, 2009 Buick Acadia
10026693NHTSA document ID
Service campaigncommunication type
27affected 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

BUICK\CADILLAC\CHEVROLET\GMC \PONTIAC\SATURN SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ONSTAR SYSTEM INOPERATIVE - REPLACE ONSTAR MODULE. THIS CAN RESULT IN AN OPEN CIRCUIT AND AN INABILITY TO CALL OR RECEIVE CALLS FROM ONSTAR. CSC LETTER WAS RECEIVED. *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
BuickEnclave2009Ask for service records and run the exact VIN before purchase.
CadillacCts2008, 2009Ask for service records and run the exact VIN before purchase.
CadillacEscalade2009Ask for service records and run the exact VIN before purchase.
CadillacEscalade Esv2009Ask for service records and run the exact VIN before purchase.
CadillacEscalade Ext2009Ask for service records and run the exact VIN before purchase.
CadillacSrx2009Ask for service records and run the exact VIN before purchase.
CadillacSts2009Ask for service records and run the exact VIN before purchase.
CadillacXlr2009Ask for service records and run the exact VIN before purchase.
ChevroletAvalanche2009Ask for service records and run the exact VIN before purchase.
ChevroletCobalt2009Ask for service records and run the exact VIN before purchase.
ChevroletCorvette2009Ask for service records and run the exact VIN before purchase.
ChevroletEquinox2009Ask for service records and run the exact VIN before purchase.
ChevroletHhr2009Ask for service records and run the exact VIN before purchase.
ChevroletSilverado2009Ask for service records and run the exact VIN before purchase.
ChevroletSuburban2009Ask for service records and run the exact VIN before purchase.
ChevroletTahoe2009Ask for service records and run the exact VIN before purchase.
ChevroletTraverse2009Ask for service records and run the exact VIN before purchase.
GMCAcadia2009Ask 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 10026693?

BUICK\CADILLAC\CHEVROLET\GMC \PONTIAC\SATURN SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ONSTAR SYSTEM INOPERATIVE - REPLACE ONSTAR MODULE. THIS CAN RESULT IN AN OPEN CIRCUIT AND AN INABILITY TO CALL OR RECEIVE CALLS FROM ONSTAR. CSC LETTER WAS RECEIVED. *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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