Question about 1997 GMC Jimmy

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97 gmc jimmy cranks but won't start, have replaced everything possible but still won't start, most of the time the brake lights won't work, or the gauges goes crazy. I have changed relays, sensors, fuel pump, everything is new even changed the computer but still won't start. Any suggestion that may be helpful, over a $ 1000.00 and still can't use this vehicle.

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EdCarCal

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  • GMC Master
  • 1,143 Answers

There are two basic reasons for not starting - no spark or no fuel, both of which are controlled by the ECM. You need to check error codes and these items - for the spark, test it at the cylinder 1 sparkplug; for the fuel check the pressure (if too high or low, problem!).

Posted on Sep 11, 2017

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5 Related Answers

Anonymous

  • 1 Answer

SOURCE: 97 jimmy

check your coolant temp sensor resistance cold and warm, the colder the more resistance

Posted on Jan 14, 2009

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Anonymous

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SOURCE: fuel problems 97 jimmy

Yeah, The fuel pump can go bad . The normal warranty on the pump is 12 months or 12,000 miles. This is very rare . I would check if the fuel pump had a lifetime warranty.

I would also check the ignition switch, and all the fuses to make sure the fuel pump is the failure.

Good Luck

Posted on Mar 18, 2009

Molson02536

Harvey N Tawatao

  • 3854 Answers

SOURCE: location of fuel pump relay on a 97 GMC Jimmy?

Fuel pump relay is in your gluve box. I belive there are three relay's there and it could be the middle one. Getting old memory bad LOL.

Posted on Apr 05, 2009

Bruce Hathcock

  • 3600 Answers

SOURCE: GMC JIMMY NO START BUT GOT SPARK AND FUEL

try the oil pressure switch, that was a common problem on Gm trucks when I used to work on them, the oils switch was bad and woulden't allow it to start and the ones I worked on were on the back of the distributor.

Posted on May 29, 2009

Richard Delahant

  • 1201 Answers

SOURCE: Brake pedal still goes to floor 2000 GMC Jimmy

It's very possible to be the master cylinder, the o-rings on the piston could be worn, letting the fluid seep back through instead of getting full pressure through the lines. Could also be the brake booster.
Try changing the master cylinder first, which is cheaper and easier, and see if there is a difference, you'll need to bleed the brakes again.
To check the booster,
With the engine off, pump the brakes until the pedal is hard, then hold pressure on the brake pedal and listen for air escaping, or the pedal goes slowly to the floor, Do that after the master cylinder has been changed, at least that will be eliminated.

Posted on Sep 15, 2009

Testimonial: "Hadn't thought about the O-rings on the rod thanks for the idea. Great Idea Thanks!"

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97 gmc 1500 350 5.7 new fuel pump and filter it cranks over but wont start


Kelly, could be a few issues, security lock out, crank sensor, fuel pump fuse/relay, faulty new pump,faulty ignition switch, etc. Attached links may help you diagnose the crank no start issue you are having.
Check the attached links,video,instruction and guides, Good luck
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You will have to pinpoint what the engine is missing...
- Spark
- Fuel
- Compression

All three of these are tested when the engine is being cranked over. There are two way of checking for fuel. Fuel pressure and fuel trigger. Both are very important and must be present for the engine to start. Fuel pressure is self explanatory. You just hook up the gage and see what the reading is. Fuel trigger is check with a noid light. The injector gets unplugged and the noid light gets plugged in to the injector clip. With the engine cranking over, this light must blink. This is the signal to the injectors from the computer. You can have all the fuel pressure in the world, but it wont matter if the injector is not pulsing gas into the cylinder like it should.

Compression tester, spark tester, fuel pressure gage and noid light are all accessible at your local auto store. All three tests play a very important part in diagnosing a no start condition. Be extremely careful when doing these tests.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

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Won't crank


Take mass air flow sensor off and clean the inside with a non-chlronated brake cleaner and allow to dry for 15 minutes then re-install.

Dec 04, 2011 | 2000 GMC Jimmy

1 Answer

Where is the brake light relay on 97 jimmy 4X4


under hood in panel box.First try this, push and hold brake pedal while pushing on and wiggle the hazard switch if brake lights come on then replace the turn signal switch and you will have brake lights.

Nov 03, 2011 | 1997 GMC Jimmy

1 Answer

My 97 jimmy will crank but won't turn over. Is it the starter and if so, where do I find it so I can replace it.


If it cranks, but won't start (which is what it sounds like you're saying) the starter is NOT the problem. Check ignition and fuel.

Aug 21, 2011 | 1997 GMC Jimmy

1 Answer

CRANKS BUT DOES NOT START


I had this problem with my 97 Jimmy. It is your ignition switch. The switch that touches the tumbler gets wore down. You'll have to tear the steering column apart to get to it and you will need a really small torx driver (not sure what size). Good Luck.

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