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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 17, 2005
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Open Help Requests for GM
Help Request Answers
1995 Buick Park Avenue 3.8L crank no start VIN: 1G4CW52K5S
I have a code P1629 passkey theft deterent failure. I have read all data's test procedure for this but cannot find a wiring diagram to show position of wires in the decoder and where they go to. I am supposed to check voltage at wire A3 but I do not see any ma...
1990 Chevrolet K1500 Cheyenne 5.7L Speedometer goes to zero VIN: 1JTNTR4KKL
Customer has a complaint of the speedo going to zero and abs light flashes at same time--- last time we checked code was for excess dump valve activity. We replacd speed sensor and sent cluster to service center---they couldnt find anything wrong. They even tr...
1992 Chevrolet Lumina 3.1L 2-1 downshift VIN: 2G1WL54T1N
Need some help from GM guys on this one as im a chrysler tech. this car will upshift perfectly and down shift perfectly except for 2-1 downshift it is very hard, checked all mounts, good, fluid great condition( serviced 3 mo ago)c-vs good condition, throttle l...
1992 Chevrolet Lumina APV 3.8L Cuts out, Misfire, MIL Lamp on VIN: 1GNDU06L7N
Hey all, Thanks in advance for any assistance or direction ya'll can provide. This one has me chasing my tail all over. Van originally came in with a stumble especially hot and under very slight acceleration. MIL was on so I started there and found a code 018... Trouble codes: 018 (Crank-cam error)
1993 Chevrolet Lumina Euro 3.1L Electronic VIN: 2G1WN54TXP
bought the car for the old lady. now first start in the morning you need to wait for a min before it goes in gear.haven't mess with tran much.thanks for your help.
2001 Chevrolet Express 3500 5.7L #3 fues blows immediatly VIN: 1GAHG39R81
This one has me stumped.I have pulled all the door panels,floor and roof crtsy bulbs and sockets, every thing looks good. I even unpluged the head light switch witch has the switch for the dome lights and it still blows immediatly. Any one have any experience ...
1997 Pontiac Grand Prix SE 3.8L Cuts out, Stall VIN: 1G2WP55219
This car stalls intermitently. Then could go for a week or more no problem. Sometimes it might do it twice in one day. Car will start, drive normaly then stall, often time at highway speed. If you coast to the side of the road, and cycle the key it might rest...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick LeSabre Limited 3.8L Speedometer VIN: 1G4HR52KXV
Customer finally returned with vehicle. This time speedo was not working. Test drove with scantool and that showed good mph reading at all times. Sometimes could get speedo to work by rapping on dash, could also get it to quit by rapping again. New instrument ...
1999 Buick Century Custom 3.1L transmission VIN: 2G4WS52M8X
Seven out of eleven replies were right.The bearing was bad in the drive chain spocket.I had the converter cut apart and checked,just for peace of mind.They showed me the bearings and clutches and all ok.One reply said that if there was a noise in park or neutr...
1990 Cadillac DeVille 4.5L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 1G6CD5332L
Our thanks to all who responded. We ohmed the injectors only two of which were within spec. replaced all eight and vehicle flew through the emissions test. Thanks especially to doug, tony, robert, and jim. you guys were right on thanks again to all. Jim & Ch... Trouble codes: E49.
1984 Chevrolet S10 2.8L Stall VIN: 1GCCS14B1E
Thank You to all that replied. Turns out it had a hole in the fuel line between the tank and pump. Replace line as is well. Thank You all again.
1988 Chevrolet K1500 Cheyenne 5.7L No Start, Stall VIN: 1GCDK14K4J
well thank you for all the great advise. this one should be fixed for good, if everything i knew and learned on iatn about carter pumps is true. the delco pump didnt fail this time. after double checking everything to the tank, i pulled the tank and unpluged t...
1995 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13WXS
held on fast idle for 30min and cleared codes got cat monitor to run and it passed thanks for your help Trouble codes: P0171, P0172.
1995 Chevrolet Lumina LS 3.1L No Start VIN: 2G1WN52MDS
hey, guys it was fixed for about 15 mins. i pulled the valve covers and found number 6 exhaust push rod was broken and that 1 and 3 cylinders the rocker arms had fallen off. only thought is that it took about 30 mins for the lifters to pump up the first time i...
1990 GMC G3500 Magnavan 5.7L Main Bearings VIN: 1GTHP32KXL
I have been instructed to rebuild the engine AGAIN!, we are going to replace the torque converter and totally bypass the external oil cooler. Were going to install new crankshaft, new oil pump & pickup, etc, etc. So back to the hot tank, bucket of soap, plasti...
1998 GMC Jimmy Envoy 4.3L Hesitation, Cuts out, MIL Lamp on VIN: 1GKDT13W9W
Found wire harness at right rear corner of intake rubbed through and intermittently grounding out.
2001 GMC Savana 2500 4.3L No Start VIN: 1GTFG25W11
problem was fuel pressure. thought pressure was good at cranking at 55 psi. should have been 60-65 psi. 5 psi makes a difference. car started up right away after fuel pump was replaced. thanks for the help.
1997 Oldsmobile Aurora 4.0L fans VIN: 1G3GR62C5V
talk to menber gene adout this problem. he thougth that was nothing wrong.this vehcile coolant temp. runs at higher temp. low speed fans come on at 220 to 225 and high speed fans at 235. so i block of rad. and ran untill fans came on witch was within that temp...
1998 Pontiac Bonneville SE 3.8L interior & parking lights VIN: 1G2HX52K5W
I would like to thank everyone who offered help. I've lost count of how many hours we wasted on this car. Found a shorted wire at the left rear courtesy light.. Thought we had found the problem. Nope.. Two of us were standing at the car trying to figure out wh...
2002 Pontiac Grand Am SE 2.2L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on
Scott and Wally were both right...this thing had bad 2/3 coil and a partially plugged converter[when we chopped the cat off there was a chunk of substrate SIDEWAYS in the outlet]That explains some of the intermittant.The mistake I made was not looking at highe...
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