2008 GMC Savana 2500 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2008 GMC Savana 2500
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2008 GMC Savana 2500 ProblemsReduced Power and Check Engine Light
The 2008-2015 GMC Savana 2500 uses a throttle position sensor (TPS) which commonly fails and causes:
- Check engine light illumination
- Reduced Power message
- OBD trouble code P2135
This issue is related to the throttle position sensor, and can be caused by faulty wiring to the TPS, bad connection at the TPS, or a failed TPS.
To correct this issue, the wiring harness, connector, and throttle position sensor must be inspected, tested, and/or replaced. The most common cause is a faulty TPS.
The tail light wiring harness in the cargo area is not protected very well. As a result it may become damaged due to normal wear a tear. This damage can causing some or all of the rear lights to stop working.
The spark plugs should be replaced every 100,000 miles. Our technicians recommend replacing the spark plug wires also at this time.
2008 GMC Savana 2500 QuestionsWill start/not start sporadically. When it doesn't start, doesn't turn over (1 answer)
Battery has been replaced but didn't fix the issue. The problem seems to occur more often when trying to start the van after it has recently been run. (Stalled at the gas pump, in a parking lot after getting groceries.)
When it doesn't start and the key is turned, the van has full po...
2008 GMC Savana 2500 RecallsTransmission May Malfunction/Engine May Shut Down At High Speeds
The transmission management software could be faulty and may cause the transmission to shift erratically or the engine to stall at highway speeds. This could result in transmission damage and vehicle breakdown. Dealers will reprogram the transmission control module and engine control module. The GM recall number is N080218. This recall began on July 30, 2008.
The frame rail of the vehicle may be wider than intended. If this is the case, the fuel tank may rub on the frame rail and eventually may leak. Leaking fuel presents a fire hazard. Dealers will inspect the vehicle and modify the frame rail if required. The GM recall number is 080205. This recall began on July 30, 2008.