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G20

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Question
Car will not shift into gears above 2nd gear.
Hello, your transmission is electronically controlled so there can be a different problem with the same outcome. There is a transmission control unit that controls two electronic solenoids that control fluid flow to the valve body. Your transmission has solenoids...
Question
TPS sensor calibration or replacement.
The TPS will need to have a voltage reading of .5 volts with the throttle closed and key on engine off. This can be done with either a voltmeter set to DC voltage or a scan tool capable of reading...
Question
Q: Brake lights staying on.
Hi there, Chances are the brake light switch is faulty. My advice is to have a mechanic, such as one from YourMechanic, diagnose and repair the brake light switch circuit. Fuse 14 can be removed when the car is not...
Question
Van door not unlocking or opening.
The rear door lock actuator can fail in two ways electrically or mechanically. If it fails electrically you will not hear the actuator try to operate when you try to lock/unlock the door. If it fails mechanically like the gear...
Question
Car makes squeaking noise
Squeaks can drive you crazy. The problem is that any part in the suspension can squeak when the suspension is moved. There are ball joints, tie rods, control arm bushings, sway bar links and bushings, and struts making up the...
Question
Clutch difficult to press
The problem you are describing sounds like you have a pressure plate that may have a broken spring or the release bearing is binding on the transmission nose cone. I would recommend having the clutch system bled out and new...
Question
Acceleration issue, RPMs increase but not speed
If your car is revving up but not moving, or is slow at gaining speed, then you have a slipping clutch. If you have a manual or automatic transmission it will still be a clutch issue. A mechanic with experience...
Question
Q: Thumping sounds while driving over sharp bumps
The only part you did not mention (and the most likely cause of the problem) is the inside lower control arm bushings are bad. I would also check the steering gear mount bushings for excessive wear. Both of these bushings...
Question
Q: Thumping sounds while driving over sharp bumps
The only part you did not mention and the most likely cause of the problem is the inside lower control bushings which could possibly be bad. I would also check the steering gear mount bushings for excessive wear. Both of...
Question
Q: Stalling when put into drive
Check the inlet air tube between the mass airflow sensor and the throttle body for cracks or loose connections. When you put the vehicle in drive it pulls the hose longer and when it's put in reverse it pushes the...
Question
Dashboard lights won't work at night
With the dashboard lights not coming on, the car is not safe to drive as you are unable to see warning messages on the dash and the speedometer. The most common causes for this dashboard light problem is the lights...
Question
ABS runs key out
The ABS pump is fed power directly from a fusible link and not the 10A brake fuse. If the pump is running non-stop, this is an indication of a faulty brake pressure modulator valve unit that will need to be...
Question
Won't Shift into drive
The VSS (vehicle speed sensor) buffer is located on the drivers side near the ECM. I have heard of instances where the connector between the VSS and the buffer has become disconnected. The wiring between the VSS and the buffer...
Question
Q: cold start issues
Hi Jim. The poor cold start may be related to a faulty/dirty IAC (idle air control) valve not allowing engine RPM (revolutions per minute) to increase with ambient temperatures below 30 degrees. Assuming the check engine light is on, accessing...
Question
pulley fell off
For the 1995 G-20, all of the brackets in the location you describe are listed in GM parts catalogs. Using those catalogs, and your description, I narrowed it down to 5 possible GM part numbers: 10187650, 10179211, 10163742, 10163742, 10028767....
Question
Q: Shifting problem?
What you are describing may be a result of a faulty speed sensor, potentially low transmission fluid or a even a faulty transmission control solenoid. As your vehicle travels down the road, the computer analyzes data being sent by vehicle...
Question
1991 chevy g20 van replaced wih new fly wheel and starter after 2 days getting clanking sound when i first start vehicle
You should check to make sure the starter bolts did not come loose and remove the lower inspection cover for transmission and check to see if flywheel teeth are damaged or flywheel is loose or bolts for torque converter are...
Question
P1336 code keeps coming up on my code reader, I've replaced the crankshaft position sensor but the code keeps coming back, why?
Hi Rick. Thanks for contacting us today. This Infiniti specific code can be related to other items besides the crankshaft position sensor itself. Some of the common sources include the Crankshaft Position Sensor harness is open or shorted, has a...
Question
P1336 code, crankshaft position sensor variation not learned
The code that you are referring to typically means there is an electrical problem in the crankshaft position sensor circuit. The issue is not necessarily the sensor itself and thus the output of the sensor must be viewed on a...
Question
Chevy G20 1990 Van not starting. Transmission issues addressed. thumping noise during idle. Reservoir overflowed, no oil pressure
Hi there. Unfortunately, it's possible that your husband was correct about the cracked head gasket, but using a liquid "stop leak" product most likely made it worse. What likely occurred is whatever substance that was used to resolve the head...

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