20 Most Recent 1996 GMC Suburban - Page 9 Questions & Answers

Try changing bulbs first

See what you are missing. Fuel or spark. This will cut the condition in half.

try charging bat and all so have some 1 turn key on and off get by gas tank see if fuel pump is runing that yr had bad prob with wireing harnes going bad to the fuel pump

Stop engine and ck for a loose pully, Check the belt tensioner. flying parts under the hood no good.

Check the starter relay.

Cruise control is suppose to cancel when brakes are applied.

Did you try just changing the bulbs?

If its not the bulbs I would have to say check the brake light switch at the pedal, it is a different switch than the cruise control cut out switch. Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c

I would go to the auto parts store and get a service manual, like a Haynes manual for your vehicle.

can be lifter going bad,rocker arm loose (once oil warms and thins out) can also be a minor exhaust gasket leak

Is there spark at the plugs? If not, check the coil.

It sounds like the wiper motor has a bad gear. Replace the motor and it should solve your problem.

The fuel pump module may not be bad. If you hear whirr that is good. Did you change both of the filters, the one on the fuel pump and the external filter (the one along the frame of the trunk). Also did you clean out the tank? If you did all that the next step would most likly point to fuel injectors.

Do you have spark?
Put one of the old plugs in a spark plug wire and crank her over.
Make sure the plug is grounded.
Any spark?
Most likely the ignition module.
Next would be the crank sensor.......or dist pickup.

Yes to spark?
Put a little gas down the throttle body.......and see if it starts on that.

Yes to a start then dies out?
No fuel.
Most likely the fuel pump in the tank.
Turn the key off for at least 10 seconds.
Have someone listen closely at the tank........now turn the key only to run position....you should hear a prime cycle whirrrrr for about 1 or 2 seconds.
No noise? means....no working pump.
Check all fuses........but it will most likely be first....fuel pump.....second....fuel pump relay....third....no power to the fuel system.
Yes to whirrrr.........then it's ......no fuel injectors are opening if you have fuel injection.

worn clutches or pump loosing pressure tranny most likly needs an overhaul the p1870 code is slipping transmission components

WELL YOU CAN CHECK.YOU USE TO BUY PARTS TO OVERHAUL YOUR SELF NEW O -RINGS.BUT NOW SOME AUTO PARTS PLACES. MAKE YOU BUY THE WHOLE UNIT.

if its inside the cab? your heater core is leaking most likely

have you done the harness update when you did the pump

two seperate problems check for power at fuse box possible blown fuse link on starter

seems like you didnt replace the crush sleeve and there is too much backlash in the ring and pinion must have over a 100,000 miles