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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 25, 2004
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Open Help Requests for GM
Help Request Answers
1990 Buick Regal 3.8L Cuts out VIN: 2G4WB55L7R
Vehicle dies while driving, will restart if put into netrual. Has no codes, have good fuel pressure, while in park vehicle will idle for hours. Have replace fuel filter, oil pressure switch, and gave vehicle tune up. has passed smog, also replace TBS. has anyo...
1998 Buick Century Custom 3.1L abs and master cyl
Did front pads, clean & adjust the rears, and attempted brake fluid flush. I pushed in the piston pushing the fluid back to the master. No fluid will come out the wheel cylinders for anything. If i opened the lines for the rears at the abs unit and no fluid co...
1988 Chevrolet C1500 Cheyenne 5.7L Cuts out, Stall, BUCKING SURGE VIN: 2GCDC19K7J
ON the first test drive I noticed 3 concerns: 1st: BUCKING under light acceleration from slow speed 2nd: CUTS OUT at cruse (like the key was switched off-only for 1 to 3 seconds then comes back to life) 3rd: STALL on decel & at idle in gear. I have checked: M... Trouble codes: 45 (RICH EXHAUST memory has not reset)
1988 Chevrolet Suburban R20 5.7L Excessive Emissions, Poor Idle Quality, Cuts out, Stall
Please help!!! Running out of ideas. someone else put a t-body on it trying solove this problem. will not idle when cold and will not run unless you pump the pedel. fuel pressure is 14lbs and very steady,intergrator @135.if you hold rpm up at 2500 you can watc...
1992 Chevrolet Camaro RS 5.0L kills fuel pumps VIN: 1G1FP23E2N
hello fello techs , maybe you can clue me in the right direction. this car is high milage 182437 ,yet has been kept up in excellent condition. it has a new fuel pump relay ,new sender assembly, wire harness and pigtail connecter that plugs into the body harnes...
1996 Chevrolet K3500 Cheyenne 6.5L Poor Fuel Economy, MIL Lamp on VIN: 1GCHK39F1T
need some help after repairing the engine do to a timing chain brake bent valves heads were cracked replaced them do not know if this is a new problem or not but the truck seems to be a dog and lots of black smoke under load. also the ses light comes on for tu... Trouble codes: P0236 (boost sensor)
1997 Chevrolet Astro 4.3L Misfire VIN: 1GBEL19W2V
We recently replaced Headgaskets in this van. It has comeback to us with a random misfire. We scanned it determined that 2 of 6 injectors had failed and that #4 plug wire Failed. We replaced all 6 injectors and replaced the wire set again. The random miss was ...
1999 Chevrolet Astro 4.3L Unknown VIN: 1GCDM19W9X
this van has an 1870 trans code. freeze frame data indicates problem was detected at 54 mph.13% throttle,engine fully warmed up and 20% engine load. so i have to assume there is a problem in the tcc. where i am lost is,,,i can not duplicate the conditions that...
2001 Chevrolet Blazer LS 4.3L No Start VIN: 1GNDT13W51
I believe I have a problem with a passlock syst. Crank's but no start,security light flashes and dtc P1631C in memory. This vehical started an drove fine when it was inspected as a used car a month or so ago. It looks like it has a set of fresh cut key's that ... Trouble codes: P1631
1994 Pontiac Firebird 3.4L Poor Idle Quality, Hesitation, Stall, Misfire VIN: 2G2FS22S9R
this vehicle came in with 4 dead cylinders two wires were open and one of the coil packs were arcing through the side of the tower onto the ignition module. i replaced the plugs, wires, coil pack, and module. the car then ran. now the car has two dead cylinder...
1995 Pontiac Bonneville SE 3.8L No Start VIN: 1G2HX52K5S
Customer complaint of sometime vehicle will not start after a shutdown. Wait awhile and it will start. I cannot duplicate problem. After no start, code 321 is stored. Code will clear, and not return untill next time it will not start. Any known pattern failure... Trouble codes: 321 (no 18x ign pulses)

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick Century Special 3.1L Oil in system VIN: 1G4AG55M2R
Hey guys, First of all I would like to thank everyone who replied. I recieved A lot of replies saying the intake gaskets are causing this. Im not sure why so many people would think this due to the fact that there is no oil pressure where the intake gaskets se...
1994 Cadillac Seville STS 4.6L oil leak lower block VIN: 1G6KY5296R
Thanks for the technical help to all the replied. The vehicle has been completed for quite a few weeks now and has returned for checkup and all is good. This vehicle was repaired as per correct installation from best judgement from years of experience. The cra...
1997 Cadillac Seville STS 4.6L cooling system VIN: 1G6KY5290V
Thank you guys for your knowlege and taking the time to reply. Just as many of you suggested, 'Head Gaskets'. After a few hard accelerations on the road, combustion gasses showed up in the cooling system. I suspect that it will have a few pulled theads at the ...
1993 Chevrolet K1500 Cheyenne 5.7L system pressures VIN: 2GCEK19K6P
Thanks to everyone who helped. Several brought up adjusting the cycling switch, but this one was not adjustable. Others mentioned that the system might be overcharged with oil or the oil in the accumulator was not circulating, so I replaced the accumalator aga...
1996 Chevrolet Astro 4.3L No Start VIN: 1GBDM19W2T
the van is now running but has a transmission code still.somewhere in between changing the fuel pressure regulator for too much pressure 90 psi to getting the right pressure but leaking down after key off i replaced the regulator a second time but must have mi...
1998 Chevrolet Venture 3.4L water pump VIN: IGNDX03E1W
Had six responses. The consensus was that NAPA premium pumps for v-6 can cause problems, one person saying that he had seen them leak after three hours' driving. Two recommended GM pumps with one saying to put ginger root tabs in the coolant. One said to flush...
2000 Chevrolet Blazer LS 4.3L No Start VIN: 1GNDT13W6Y
thank you gentlemen for your replies.we put a new fuel pump pigtail on the truck and so far,(800 miles) the vehicle has been doing great. thank you techs for taking the time to assist us.it is greatly appreciated.
2000 Chevrolet Express 2500 5.7L Brakes VIN: 1GCGG25R2Y
We never found a definite cause for this complaint. I spoke to our GM Fleet rep and he has never heard of this type of complaint. As a precaution, we replaced the master cylinder/hydroboost assy. As this problem only occurs every few months, we will not know f...
2002 Chevrolet Silverado 1500 5.3L overheat VIN: 2GCEK19T22
Many thanks for those who responded. Repair ended up being blockage in the tube from the radiator to the fill tank. Even though we bled the air repeatedly the bleed tube would not let us get all the air from the system. Thanks again to those who read the messa...
1995 GMC Yukon SLE 5.7L Surge, Stall VIN: 1GKEC13K4S
Hi fellows 'TECHS',thanks for the fast response and thank you very very much for helping me on this one,received four reply Steven,Paul,Stan and Bob,new OEM e.g.r.valve solve the problem. Thanks again and thanks to IATN also.
1997 GMC Savana 3500 5.7L Hesitation, Surge, Misfire VIN: 1GTHG35R4V
As many suggested, I cleaned the injectors with some improvement in overall performance, but still had a stumble/stall during open loop operation on initial start. The cure was a replacement PCM. I wish I could explain why or how, but I can't. Most likely the ...
1988 Oldsmobile Cutlass Calais SL 2.5L speedometer VIN: 1G3NT14U9J
customer declined to replace instrument panel.car only driven few time a week locally.speedo buffer/driver not available seperatly on this model.
1992 Pontiac Grand Am SE 2.3L Excessive Emissions, Hesitation, Stall VIN: 1G2NE5439N
Hello techs, thanks for the response. I reinstalled all the old parts except for the new plugs and the bad pressure regulator. Delco offered an OE and aftermarket O2 sensor. The OE sensor part number matched the number we had installed a month ago, but we remo...
1998 Pontiac Bonneville SE 3.8L MIL Lamp on VIN: 1G2HX52KXW
sorry it took so long but i just got the car back today thanks to everyone who replied turns out the tan and black wire was pushed back in connector on the front of the intake just like what was suggested thanks again Trouble codes: P1352.
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