October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Circuit/System Verification

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

Review the Failure Records when the DTC set.
- If the engine coolant temperature (ECT) was above 125°C (257°F) when the DTC set, go to Symptoms - Engine Cooling and correct that concern first.
Perform the Transmission Fluid Cooler Flushing and Flow Test .