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.
EGR System Check
- With engine coolant temperature below 113°F (45°C), run engine and touch EGR diaphragm with finger to check that EGR valve diaphragm is not operating.
- Warm engine to normal operating temperature. Check that EGR valve diaphragm moves in correct direction during acceleration and deceleration.
Courtesy of GENERAL MOTORS CORP.