Throttle Valve Control Pressure Check
- Install pressure gauge on transmission line pressure tap. See Fig 1. Install tachometer on engine. Apply parking brake. Ensure engine is at normal operating temperature.
- Operate engine at 1000 RPM. With gear selector in "P" position, note oil pressure reading. Move gear selector to "D" position, and note oil pressure reading.
- Oil pressure "D" reading must be equal to "P" reading or must not exceed it by more than 10 psi (.70 kg/cm). Operate engine at 1400 RPM. Oil pressure should increase. Adjust throttle valve cable if pressure does not increase. See appropriate AUTO TRANS SERVICING article in the AUTOMATIC TRANS SERVICE section. See menu below.
- For Astro, see TRANSMISSION SERVICING - A/T
- For 1993 Blazer C/K 4WD, see TRANSMISSION SERVICING - A/T
- For Blazer S/T, see TRANSMISSION SERVICING - A/T
- For 1993 Camaro, see TRANSMISSION SERVICING - A/T
- For 1994 Camaro, see TRANSMISSION SERVICING - A/T
- For 1993 Caprice, see TRANSMISSION SERVICING - A/T
- For 1994 Caprice, see TRANSMISSION SERVICING - A/T
- For 1993 Corvette, see TRANSMISSION SERVICING - A/T
- For 1994 Corvette, see TRANSMISSION SERVICING - A/T
- For 1993 Firebird, see TRANSMISSION SERVICING - A/T
- For 1994 Firebird, see TRANSMISSION SERVICING - A/T
- For 1993 Fleetwood Brougham, see TRANSMISSION SERVICING - A/T
- For 1994 Fleetwood Brougham, see TRANSMISSION SERVICING - A/T
- For GMC Vans, see TRANSMISSION SERVICING - A/T
- For GMC Suburban, see TRANSMISSION SERVICING - A/T
- For GMC Pickup, see TRANSMISSION SERVICING - A/T
- For 1993 Impala SS, see TRANSMISSION SERVICING - A/T
- For Jimmy, see TRANSMISSION SERVICING - A/T
- For 1993 Roadmaster, see TRANSMISSION SERVICING - A/T
- For 1994 Roadmaster, see TRANSMISSION SERVICING - A/T
- For Safari, see TRANSMISSION SERVICING - A/T
- For Yukon, see TRANSMISSION SERVICING - A/T
CAUTION:
DO NOT
perform following pressure tests for longer than two (2) minutes or transmission damage may occur.