C 2500 Suburban 2WD V8-454 7.4L VIN J SFI (1998)
Idle Speed: Specifications
Automatic Transmission
Automatic Transmission
Engine should be at operating temperature 92 deg to 104 deg C (196 deg to 222 deg F). Transmission in N and vehicle in closed loop (the SCAN tool
will display RDL in Nuetral). The IAC Counts will vary (Add 2 counts for engines with less than 500 miles and for every 1000 ft. above sea level.
Idle Speed 600 +/- 25 rpm