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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 7, 2012
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Open Help Requests for GM
Help Request Answers
1993 Buick Century Special 3.3L Surge, Misfire VIN: 1G4AG55N6P
Hello techs, this vehicle came in last week, the complaint was missing and no power. Spark plugs are fine, no codes, checked resistance on injectors, OK, removed fuel rail to check injector flow and pattern. With injectors removed we could look down port of #6...
2000 Chevrolet Express 3500 7.4L Transmission VIN: 5B4LP37J2Y
After driving a long distance going up a long hill Transmission downshifts then will not shift back into 4th gear.If you stop and turn off engine then restart it will shift into fourth. This happens intermittently. This is a 454 with 4l80e transmission. I have...
1995 GMC Jimmy SL 4.3L distributor (cap&rotor) VIN: 1GKDT13W1S
I have a 1995 production date 03/95 GMC Jimmy SLT. With 226715 kms with VCM service number [...]-BABB the vechile has no trouble codes present curently or in previous history. The tack signal is 210 to 250 RPM cranking, there is plenty of spark from the coi...
1999 GMC Sierra 1500 SLT 4.8L transmission VIN: 2GTEK19V6X
This Sierra had an intermittent failure where the battery light would come on, and gauges would fail. I found and isolated the remote starter/alarm as the culprit. Removed alarm and that condition no longer exists. The Trans condition is still present. The tru...
2000 Pontiac Sunfire SE 2.2L engine VIN: 1G2JB5249Y
Also checked PCM connectors for corrosion an checked PCM grounds all good. Engine cranks well but wont fire. Has good spark, good fuel pressure, injector pulse, exhaust not restricted, air intake good, compression good. This thing should fire right up. Cant be...

Fixes & Summaries for GM
Fix/Summary Answers
2004 GMC Sierra 2500 HD 6.0L Mechanical VIN: 1GTHK29U04
FOUND IT! so after pulling all the lifters and panicking because I found no problem, I pulled the camshaft because the machine shop said they have had pitting on the lead in of the cam lobe cause a squeek. CAM WAS PERFECT. Now sweating even more. I then put a ...
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