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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 28, 2005
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Open Help Requests for GM
Help Request Answers
1964 Chevrolet truck 327CID engine
ok, we rebuilt this engine out of a box, we bored it, new 30 over pistons, cam, crank kit, edlebrock low rise intake, a edlebrock 750 performer carb, gear to gear timing. on a test stand, it sounded beutiful, after installing it into a truck, it idles perfect,...
1972 Chevrolet C10 5.7L system VIN: CCE142S149
this truck is a one owner , very nice shape, we installed a new engine and trans, customer is trying to restore. the a/c did not work for the last couple of years , so we retro fitted it to r134a, we have put on new expansion valve , replaced the poa with a re...
1975 Chevrolet Corvette Stingray 5.7L Differential VIN: 1237J5S431
Hi Guys This may seem a bit silly but we have the above vechicle in for a change of diff oil. There is no drain bung that i can see. Does this mean we have to suck the oil out or is there something i'm missing.Is ther a drain bung under the lower control arm ...
1994 Chevrolet Blazer 5.7L MIL Lamp on VIN: 1GNEK18K1R
Hello everyone. My current stumbling block is the fuel pressure on this 1994 full-size blazer. code 44-lean exhaust. On accel, even moderate accel, integrater as hi as 158, block learn as hi as 165, O2 as low as 40 mV. Truck runs well, closed loop, no other co... Trouble codes: 44 (lean exhaust)
1996 Chevrolet Express 2500 5.7L No Start, no injector pulse VIN: 4KLB4B1R0T
this vehicle is actually an isuzu npr with gm power train. there is no injector pulse, it has power to injectors but no ground. there are no codes. i have checked all wiring & grounds that i can find, also have checked & replaced cam & crank sensor & wiring & ...
1999 Chevrolet Silverado 1500 5.3L a/c belt VIN: 2GCEK19TH1
vehicle came in with a failed a/c belt. we replaced it and all was good. next day cust. went on trip, no a/c belt broken again.pulleys spin free. have seen a post for this but do not know a fix. anyone out there know it? there are no tsbs,
2000 Chevrolet Cavalier LS 2.2L No Start VIN: 1G1JF5242Y
this vehicle was towed in no start. we discovered that the fues for the fuel pump relay would blow. If we disconect the fuel pump and crank the engine it would not blow the fues. as soon as we plug the fuel pump in the fues blows as soon as we crank it over. w...
2002 Chevrolet Cavalier LS 2.2L Cuts out, Stall VIN: 1G1JF52F02
Customer complaint is intermittent stalling. Have checked fuel pressure during event, injector keeps pulsing and coil is being triggered when car acts up. HAve found 1 coil with a shorted primary. Could this cause the fault or should I look some where else. M...
1992 GMC K1500 Suburban SLE 5.7L Poor Idle Quality, Surge VIN: 1GKFK16KXN
Thanks in advance, this truck acts up after it is hot with and idle surge and a high idle , up to 2000 rpm. i replaced the iac motor and base gasket and did not help . It does not have any codes in it . Mike [...]
1996 GMC K1500 Sierra SL 4.3L High Idle VIN: 2GTEK19W8T
This truck idles at 2000 rpm when the throttle is released when coming to stop. It will idle at about 2000 rpm until completely stopped. It even does this when shifting gears. No codes present or history
1998 GMC K1500 Sierra SL 5.7L Differential VIN: 2GTEK19R6W
has anybody put in a light duty 3/4 ton housing in one of these k1500's ?, what will I need to do it, appreciate any help, thanks!
1998 GMC Jimmy Envoy 4.3L mix valve VIN: 1GKDT13W2W
This truck is equipped with the computerized climate control.Pressure check revealed normal high/low pressures. I noticed that the modes would not change from defrost to floor vents or bi-level. I traced the problem to the vacuum control solonoid. Now the mode...
1993 Oldsmobile 88 Royale LS 3.8L Misfire VIN: 1G3HY53LXP
Car came in this time for a tune up due to slight miss upon acceleration. Would run fine for about 5 mins at start up, then would act up. Before doing tune up I checked plugs and of 6 4 were white the other two were black. Replaced plugs with AC Delco, wires w...
1989 Pontiac Grand Prix SE 2.8L Stall VIN: 1G2WP14WXK
I have this car that is giving me some trouble. When it is started cold it runs fine but when warm dies out. It may restart but when throttle is pressed it dies. Sometimes it may not restart unless you hold brake pedal down or unplug Alternator. If I plug Alt....
1998 Pontiac Sunfire SE 2.2L No Start VIN: 1G2JB124XW
posting for my buddy,Got a wierd one. Engine cranks normal will not start. Plugs black and sooty. Engine compression is fine, cranking vacume 8inches but pulse width on cranking is 22 ms with a 99 engine temp. All basics coverd. Crank sensor was replaced and m...
1999 Pontiac Grand Prix GT 3.8L surge at slight acce VIN: 1G2WP52K1X
customer brought car back today said it was skipping. after test drive found out that was not skipping but had a surge upon slight accel. it is felt more with slight grade about 45-60 with trans locked up. first impulse is egr pulsating but on scanner doesn`t ...
1997 Saturn SC1 1.9L Electrical system VIN: 1G8ZJ5279U
Hi guys! This Saturn drove in with a customer complaint that at times the electrical system is dead when they try to start it. They had cleaned all the terminals they could find before they brought it to me and I rechecked their work. This is intermittant an...
1999 Saturn SC2 1.9L Hesitation, Surge VIN: 1G8ZR1274X
This vehicle came in with a bucking problem while cruising or accelerating. I have been able to duplicate it slightly one time. The above parts were replaced during tune up previously. The #1 coil had been arcing through the module so I replaced it also. MAP w...

Fixes & Summaries for GM
Fix/Summary Answers
1965 Buick RIVIERA 7.0L master cylinder VIN: 494475H942
Greetings: The 65 Riviera is well on its way to completion. It is, as several have stated, a fairly uncomplicated procedure. I am using a Bendix dual master cylinder for a 1967 Riviera with 4 wheel power drum brakes. It mates directly to the original 1965 powe...
1995 Cadillac Fleetwood 5.7L Safety VIN: 1G6KD52B35
THanks for responding to my help request. I am pleased to report that this vehicle has been successfully repaired and returned to the customer. The audible warning box had an internal short that would cause it to beep when the customer turned on his headligh...
1971 Chevrolet Chevelle SS 396CID Electronic VIN: 136371R117
Thanks to all who responded and faxed diagrams. Especially Al for the detailed page with each component and what it did. BTW the anti-dieseling and blocking relays are behind the glove box and to get there you take the dash pad off (not as bad as it sounds, ju...
1984 Chevrolet S10 2.8L No Start VIN: 1GCCS148LE
We had a very hard time finding a correct wiring diag. that we could use. Thia was a non- computerized truck with a remote coil. I used alldata, old manuals, and old GM manuals and none had good diag.(should have called alldata and had them fax some, my fault)...
1989 Chevrolet Corsica 2.0L torque converter VIN: 1G1LT5411K
Thanks to all the IATN team members who replied. The recommended fix was to replace the TCC solenoid. I did so and the problem was resolved. My long time customer was all to happy to pay me for this fix rather than a tranny rebuild. I really appreciate everyon...
1989 Chevrolet R2500 Suburban Scottsdale 7.4L Poor Idle Quality, Surge, Poor Fuel Economy, MIL Lamp on VIN: 1GNGR26NXK
thank you for all your help, the fix for this one was injectors. the injectors were from the wrong motor, we replaced injectors and updated prom. truck runs great. thank you for all idea's and assistance again. Trouble codes: 44 (exhaust lean).
1990 Chevrolet Corvette 5.7L voltmeter VIN: 1G1YY2382L
with the several replies at hand we decided that there was nothing wrong with the car. the condition was normal. thanks to all who replied. jim
1998 Chevrolet Astro 4.3L Mechanical VIN: 1GNEL19W3W
Hello everyone. Sorry to say I was not able to repair this vehicle. I got the van back in one more time and I checked all I've done and even disabled the rear brakes but still no change. Since it only pulls when you quickly tap the pedal but not when 'normal' ...
1999 Chevrolet Blazer 4.3L Hesitation, Stall, MIL Lamp on VIN: 1GE4R5T6TX
Sorry for the long delay, the oxygen sensor code was fairly easy- The wire had rubbed through on the right side frame rail causing the code to not clear. all is well. The trans code was cleared and did not return, thanks to all
1999 Chevrolet Astro 4.3L Speedo, ABS, trans VIN: 1GKDM19W1X
Thanks again to all that replied. Here is how it went, I hooked up my multi meter a the VCM input from the VSS and was able to note a pattern on my road test. When I stomped on the gas the signal dropped out, every time. Every time up untill that point it was ...
1999 GMC Safari SL 4.3L drive train VIN: 1GKEL19W9X
I would like to thank everyone who gave me input I did follow the service bulletin and so far so good.
2000 GMC c6500 7.4L park brake VIN: 1GDJ7H1D5Y
Thanks for several good suggestions,a couple of people mentioned looking for GM factory info on ebay,I'll try that.For now Shopkey faxed me the info I needed,the problem with that is you have to know what to ask for (hard to fax a whole book).I found out that ...
2000 Saturn SW2 1.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G8ZM8287Y
thanks guys for the 4 replys we had, the customer puts alot of miles on this car dailey and uses it for his job , he has lost confidence inthe car and traded it in on a new dodge minivan. thanks again Trouble codes: P0194.
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