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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 6, 2004
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Open Help Requests for GM
Help Request Answers
1940 Cadillac fleetwood 346CID gauges lights starter gen VIN: 73268612XX
We would like to convert this to a 12 volt system and need some info on what has to be done?
1993 Cadillac Seville STS 4.6L cooling VIN: 1G6KY5298P
HELP! have this caddy in shop, came in for overheating, customer ststed he just bought the car and when driving it home the car overheated, says he was sure cooling fans were not running when car overheated. Replaced instrument cluster in vehicle for uart mult...
2001 Cadillac Eldorado ETC 4.6L Stall VIN: 1G6ET12921
Car came in for intermittent stalling problem. No codes present. Fuel pressure steady at 45 psi. Found IAC valve out of range. Replaced it and the fuel filter, did three-step cleaning of fuel system and problem went away. Car came back the next day with same p...
1986 Chevrolet Caprice Classic Brougham 4.3L Hesitation, Surge VIN: 1G1BN69ZXG
this old one should be simple but it is kicking us pretty bad. car starts and drives fine until it goes into closed loop.at this point data line to scanner locks up,runs rough almost like missing,idles high or surges and iac pulses in and out.at times egr sole...
1989 Chevrolet Camaro Iroc-Z 5.0L Temp gauge VIN: 1G1FP21E1K
Does anyone know what causes the temp gauge to peg the needle ABOVE the hotest mark on the face? I have verified that the sender wire is not shorted to ground. The needle will peg when the key is turned to the start position even with the wire to the temp send...
1991 Chevrolet S10 Blazer Tahoe 4.3L fuel pump VIN: 1GNCT18ZXM
this thing is going through fuel pumps left and right. voltage drop power and gound are both ok. .2 volts power. and 1.2 millivolts for ground side. haven't seen a problem from a sticky relay or any trace voltage after key has been turned off. we have replace ...
1993 Chevrolet S10 Blazer Tahoe 4.3L won;t hold pressure VIN: 1GNCS13W5P
I know I'm not going crazy but I want to make sure. This blazer came in skipping real bad. Tested and found that fuel pressure is leaking down. Removed Plenum and foundplastic lines had a hole. Simple right replaced hoses and let it run for several hours to bu...
2000 Chevrolet Silverado 1500 5.3L Fuel Gauge VIN: 1GCEC19TXY
HI Guys! I didn't think that I would be back on here for a while but here I am. This truck came in our shop with the customer requesting for the fuel pump to be replaced. He stated that on several occasions he would have to bang on the bottom of the fuel tan...
2001 Chevrolet Impala 3.4L No Start, NO CRANK VIN: 2G1WF52E41
Tried relearn,checked power and ground circuits and passlock wiring to bcm all ok,power goes into ecm but does not trigger start relay,any help?
2003 Chevrolet Silverado 3500 LS 6.0L Stall VIN: 1GBJK34U93
Good morning friends, One of my big accounts has this 3500 chevrolet with central hydraulics for the snow plow and dump bed/salter. Ever since it was new when you raise the plow and it gets to the stop it will stall the engine, it has been back to the manufact...
1986 Oldsmobile Cutlass Ciera Brougham 2.8L hard start. VIN: 1G3AM19W9G
hello all gm guys. this is a second post to this car. i have more info about it. i can start this cold without a hick up. at about 100 degrees f the vehicle will crank with no start. after the vehicle is fully warm the vehicle will start well again. will fire ...
1999 Oldsmobile Intrigue GX 3.5L rack ; p/s pump VIN: 1G3WH52H4X
This Intrigue came in with a p/s pump noise. No TSB'S found and the noise seamed tipicial of a pump so I put one in. Same noise no change. Then I found a post here on iatn that talked of a defective rack caused by deteriorating rubber internilly. So I replaced...
1998 Pontiac Grand Prix GTP 3.8L No Start VIN: 1G2WP5216W
hope someone can help me on this .car came in as no start it had fuel presure and injector pulses but no spark.. the scanner indicates rpm and the 3x signal is indicating rpm and the 18x signal is also indicating rpm..i unpluged cam sensor still no start diago...
1999 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NE12T1X
On monday vehicle was towed in with crank and no start. Customer stated that security was flashing. When vehicle arrived confirmed all above. She also said this happened a few days earlier but was ok since. Scanner confirmed 2 codes for theft system. In the pr... Trouble codes: P1631 (password incorrect), P1632 (fuel disabled)

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick LeSabre Limited 3.8L injector pulse VIN: 1G4HR52L6S
Customer took vehicle and traded it in soon after. From what most everyone said, a computer is probably at fault. Thank you to everyone who helped!
1985 Cadillac Fleetwood 4.1L door locks VIN: 1GDW6988F9
Hi members, Thanks to all who response my post.I traced down the wiring circuit and found two problems.One is the 30 amp horn circuit breaker at the fuse box which cuts off the main feed line on and off.I tried to substitude with regular 30 amp blade type fu...
1996 Chevrolet K1500 Cheyenne 5.7L No Start VIN: 2GCEK19R8T
I took the advice of most of your answers which was replace the fuel pump. I checked inside the tank for any contaminants and found none. The fuel pump fixed it. My pressure is 65 psi now and it starts right up everytime cold or hot. Obviously the exact pressu...
1993 Oldsmobile Cutlass Ciera 3.3L No Start VIN: 1G3AG54NXP
i installed a new fuel pump which had a defective check ball and would bleed back down after the key was turned off-so i returned the defective pump for a new one-pressure would not bleed back when the key was turned off-but i also had another problem it was c...
2001 Oldsmobile Intrigue GL 3.5L MIL Lamp on VIN: 1G3WH52HO1
Paul [...] hit the nail on the head. There are Two vacuum operated check valves on this motor. One right in front on the drivers side , which I checked and was good, and one way back in the bottom corner of the pass side, which of course is the bad one. Some ... Trouble codes: P0410.
1996 Pontiac Grand Am SE 2.4L MIL Lamp on VIN: 1G2NE12T5T
Thanks for the help. I just took a stab at it and threw in a new sensor, the MIL has been off for 3 days, fixed? probably, thanks. Trouble codes: P0341 (Camshaft sensor circuit performance).
1997 Pontiac Bonneville SE 3.8L Surge VIN: G2HX52K8VH
Basicly the problem turned out to be a problem with the tcc control valve,I called transtar and they sent me a repair kit which involved replacing the valve in the valve body the job went well and Ive driven it enough to be confident that its fixed . this cust...
1997 Pontiac Grand Am SE 2.4L Misfire, MIL Lamp on VIN: 1G2NE52T2X
Hello Techs, Thanks so much for all your time. In retrospect my help request was poorly written. When I wrote 'DI cover', I meant direct ignition cover. On this car the cover holds the entire secondary ignition except for the spark plugs. It also includes th... Trouble codes: 0300 (Random misfire).
1997 Pontiac Grand Am SE 3.1L Poor Idle Quality, High Idle Speed VIN: 1GN2NE12M4
Well, you ARE friends, This car is fixed, and it was soooo easy. If only I knew what I was staring at! That 4% idle value was the INDICATOR, and I questioned the 0.96v TPS idle value, thinking that it should be more towards 0.5v, but [...] said 'below 1.0v...
2001 Pontiac Sunfire SE 2.2L Timing chain VIN: 1G2JB12441
Thanks to all for your replies. It seems so obvious now that the hole in the cam gear lines up with the tabs on the tensioner and the dot on the crank gear. My problem came from the poor illustration in Mitchells and my own hubris in not carefully noting the p...
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