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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 23, 2007
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Open Help Requests for GM
Help Request Answers
1965 Chevrolet corvette 327CID axle shaft VIN: 194675S115
ok vette guys i need help. installed new u-joints in lr axle had to replace spindle flange because it was sprung could not get both u-joint snap rings in. bolted flange and axle shaft to wheel flange the u-joint caps on the diff. side are 1/8 to 1/4 away from ...
1994 Chevrolet C3500 7.4L Master cylinder VIN: 1GDHC34K5R
Help, This is a 1 Ton company vehicle, same driver every day. It came in with clutch out, replaced all componants including flywheel. Came back in a week with the master cyl broken about 2 inches from the end on the cylinder. we have installed several differen...
1994 Chevrolet C1500 5.7L 1-2 shift VIN: 2GCEC19K3R
This is our work truck. This 4L60E will not shift into second gear most of the time. When cold it seems to shift properly the first few times. After that no second gear. The scan data shows the command to shift to second and the wires going to the tranny are ...
1995 Chevrolet K1500 Suburban 5.7L 1-2 and 3-4 shift VIN: 1GNFK16K4S
I put the whole story in the related repair history.
1999 Chevrolet Blazer 4.3L u-joint VIN: 1GNDT13W7X
Common knowledge is some GM u joints are non-servicable---some are serviced at 7500 mile intervals---I had a customer whose drive shaft u joint failed on a trip. We were the last shop he had been to for an oil change. We did not lube the drive shaft, it has gr...
2000 Chevrolet Silverado 1500 5.3L Hesitation VIN: 1GREC19T4Y
Truck came in with cold hard start and poor drivability cold for 1/2 mile. No codes. Seems to be running lean but I cant catch it on scanner. After 1/2 mile of driving it is fine all day. We first Cleaned the fuel injectors and it starts faster hot but no chan... Trouble codes: N0N
2003 Chevrolet Silverado 2500 HD 6.6L 3-4 shift VIN: 1GCHK29163
Hi everyone, Our first Allison here and it isn't going to good, We originally got this one a couple months ago and the clutchs were burned, the owner had been stuck with it and said it acted up after that so we did a overhaul on it replacing the clutchs, seal ...
2004 Chevrolet astra .0L Lighting VIN: 93CTMO8L34
Hello everyone this car is made out of the country and i don't have any info on it. I have two issues, one should be easy the other should be really easy. first I would like to know what coolant is reccommended in this car, the customer is insistant on changin...
1998 GMC Jimmy SL 4.3L heater VIN: 1GKCS13W7W
No heat most of the time. then great heat. A years ago this truck came in with the same symptoms. Flushed the system and the heater worked great. Came back a week ago,with no heat. Being that the dex-cool was only 2 years old we just flushed the heater core. n...
1999 GMC Yukon Denali 5.7L 4wd VIN: 1GKEK13R7X
hello friends. we have this 99 yukon with inop. 4WD. the switches on the dash seem to work,as they all light and blink once with ignition cycle. we found a bad connector at the transfer case encoder motor, and replaced it. fuses are good and circuit is getting...
1999 GMC K2500 Suburban 7.4L engine lifter noise VIN: 3GKGK26J1X
hi and thanks for reading my post. this 99 gmc is a regular customer. we did the lifters about 6 months ago all of them because it was ticking and they were falling apart. well, he was out of town for about 3 weaks, and the veh sat in his driveway while he wa...
2002 GMC Yukon XL 1500 SLE 5.3L heater VIN: 3GKEK16Z02
car came in with complaint of no heat in front, that is true, rear heat ok no front heat, checked temp of heater hoses going into and out of core almost 25 degree difference, problem solved--i wish-- 3 days later after removing dash and installing new oe heate...
1997 Oldsmobile Achieva S 2.4L No Start VIN: 1G3NL52T7V
Car was towed in for no start about one month ago. Security light was flashing. This system does not have the chip in key .I did the relearn and car would start some of the time.When the car would not start I could wiggle the key switch around and after a few ... Trouble codes: 1629 (theft deterrent crank signal fault)
2000 Pontiac Grand Am GT 3.4L engine VIN: 1G2NW52E5Y
first repair: vehicled failed co2 test. replaced head gaskets, t-stat, head bolts, had heads machined and checked for cracks and resurfaced. reassembled with all new gaskets. returned to customer. ok for about a week. car returned doing same thing. overheat an...
2006 Pontiac Grand Prix 3.8L security system VIN: 2G2WP55226
this vehicle was towed in for a cranking over no start and sometimes it would start and run for 20-30 seconds then die. there were no codes in the ecm, bcm or any other module. so we decided to put a cyl. lock and switch in--but we have the same result. i have...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP52K1X
replaced the ecm and all is fine so far thanks to all that replied !!! when I scoped the injectors I could see #6 drop out so I replace the ecm for a bad driver circuit Trouble codes: P0300.
2003 Buick Regal LS 3.8L 1-2 shift VIN: 2G4WB52K63
I have not fixed the vehicle yet. Problem is very intermittent and I'm leaning towards a rebuild because of the miles. Most posts suggested replacing pressure control valve.
2003 Buick Century Custom 3.1L rocker bolts VIN: 2G4WS52J63
we repaired the threads (heli coiled) on 4 of the 6 rear rockers, since only 2 would tighten to 24 ft lbs. added a little thread locker, and started it up. ran very well. thanks for all the help!
1992 Chevrolet K1500 Cheyenne 5.7L Hesitation, Misfire VIN: 1GCEK14K9N
Thanks for all the replies. It turns out that we were following a lost cause. The customer just wanted the initial problem of running rough fixed. We thought the other problem of the misfire was related to that problem. Turns out the truck has been doing t...
1993 Chevrolet C1500 Suburban 5.7L Hesitation VIN: IGNECI6K7P
Hello and thank you all this suburban is fixed. A couple of you suggested I look to the distributor for cracks or arching and I found the rotor was starting to be worn down on the outer edge. When I was removing the rotor that is when I found the slop in the...
1996 Chevrolet Caprice Classic 5.7L egr ports restricted VIN: 1G1BL52P3T
Hello everyone and thanks for the help on this one. I recieved many replies on this one about using close hangers etc to ream this out. Also some were lighting the carbon up with a torch etc. Scares me, but will trust that works. I found that this one was ...
1997 Chevrolet Blazer 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GNCS13W4V
Many thanx to all who responded. Sam from AR brought up inj. issues and also dist. cap problems. The cap had already been replaced before I got the truck from another shop. I had already installed a new inj. in cyl. #2 position as well with no change to sympt... Trouble codes: P0300.
1997 Chevrolet K1500 5.7L Misfire VIN: 2GTEK19R8V
This vehicle has not come back yet for further diagnosis.Some techs suggested the injector system, and I am leaning in that direction.Other than that, most suggestions were the usual common items. Thanks for all the help, Dave
1999 Chevrolet Corvette 5.7L Automatic Door Locks and Loss of Key Fob Memory VIN: 1G1YY32G4X
Thanks to all who replied. The customer decided to trade the car off
2000 Chevrolet S10 2.2L MIL Lamp on VIN: 1GCCS1944Y
after 2 crank sensors i tighend the pins in the ecu connector and havent any more probs we will see the dealer had already put the icm on the car thanks for the help Trouble codes: 335 (ckpcircuit).
2003 Chevrolet Impala 3.8L Run Stand
I received a few good replies on this one. Most helpful suggestions included the use of bypass modules for theft deterrent systems. I chose to go with modules from fortin electronics. After wiring all of the computers and anti-theft systems, I was able to u...
2003 Chevrolet Cab & Chassis Silverado 3500 6.0L no fuel
well the truck is fixed with 2 problems found.problem 1 The new aftermarket sending unit wand is one inch to long. and there is a very narrow window for it to move it was stuck at empty.the next problem is alittle strange.there are three wires i was testing ,...
2004 Chevrolet Venture LS 3.4L wire harnesses VIN: 1GNDU03E54
When you lift the carpet to find 2 gallons of water and a thriving colony of slime mold, you know there is a major problem. Haha. Wash hands frequently. ... ... In this case, the sole source of the water was A/C condensation. I had just finished drying ...
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