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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 14, 2013
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Open Help Requests for GM
Help Request Answers
1971 Chevrolet C20 Pickup 4.1L Hesitation, Cuts out VIN: CS241B6412
Can this carburetor be fixed? This occasional use old truck has no power under load. When cold, drives OK. When warm it goes lean when throttle is opened over 1/4. No power, backfiring, etc. When opening the throttle slowly under load, there is a distinct poi...
1986 Chevrolet Corvette 5.7L No Start, Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1G1YY6782G
Service engine soon light will come on and sets code 41- cylinder select error and runs very poorly/ will not idle without feathering throttle. Tested powers and grounds at the pcm and found to be present. Code then says to replace the pcm/prom assembly. Since... Trouble codes: 41 (cylinder select error)
1992 Chevrolet K1500 Cheyenne 5.7L No Start VIN: 1GCEK14K5N
Came in for no start if cranked normally but will start if fuel added to throttle body. Verified no injector pulse when cranking, power supply ok. Ran "No Start" flow chart, injectors would pulse if High Reference circuit coming out of ignition module is touch...
2002 Chevrolet Impala 3.4L engine swap VIN: 2G1WF52E92
We are stuck doing an engine swap.The replacement engine is from a 2004 grand am and the cam sensors are different.I am wanting to know can this be used without changing cams??? The trigger is different as is the sensor.Any help is appreciated.
2004 Chevrolet Tahoe LS 5.3L Transfer Cas VIN: 1GNEK13Z34
We have a transfer case hat will not shift out of 4 wheel high. codes C0300 rear propeller shaft circuit malfunction/C0305 front shaft speed sensor fault/C0306 Motor A/B circuit malfunction/C0321 transfer transfer case lock circuit fault/C0327 Encoder circuit/...
2005 Chevrolet Astro 4.3L Mechanical VIN: 1GCDM19X95
i have a 2005 astro van 4.3 and it keeps showing number one misfire it has been to just about every shop in the richmond area and has a stack of repair orders that have shown they have replaced all injectors,fuel meter body,fuel pump and filter,fuel pressure r...
2006 GMC Sierra 2500 HD SLT 6.6L Power Steering VIN: 1GTHK23D76
The truck came in for a simple steering gear leaking and a bad tie rod end. After we changed both and aligned the truck we flushed the power steering and purged the air from the system. After we drove the truck a short while the power steering steering start...
2003 Oldsmobile Alero GL 2.2L abs VIN: 1G3NL12F93
I have an Alero that came into the shop with the park lamps intermittently staying on after the key was shut off.Lights would stay on until relay disconnected.Found a wire behind the cluster that someone scotch locked in.Disconnected and let the car go.Girl ca...
1987 Pontiac Firebird Trans Am 5.7L fuel injection
This Trans Am runs rough all the time. it appears that it is running lean by virture of the integrator and block learn numbers. I checked Vacuum it is @ 19" @idle, 0"@snap throttle, bounces up to 24" and stabilizes back @19. I smoked theintake, found 2 small v...
2001 Pontiac Grand Am SE 2.4L monitors VIN: 1G2NF52TX1
hi to all and thanks in advance I got this 02 grand am im having a problem getting the monitors to complete the cat and evap the car was driven 600 miles and still inc the cat looked marginal on the scanner so we replaced it the temp and all the outher pids lo...

Fixes & Summaries for GM
Fix/Summary Answers
1999 GMC C3500 Sierra SL 6.5L No Start VIN: 1GDKC34F4X
Well my original request asked if there was a way to fake the signal to PCM to bypass security. I know I left out that this was a good friend of mine and since it was a bucket truck with all kinds of integrated electronics and 14 years old we were looking for ... Trouble codes: P1626 (vech theft deturant controller serial data), U1000.
2003 Pontiac Vibe GT 1.8L MIL Lamp on VIN: 5Y2SN64L53
sorry for late post but we have quite busy the last few days. The more I thought about the way my scan data showed a very slow cycling from lean to rich on bnk 1 sens 1 even with a new sensor installed. I agreed with the idea that system seemed like it had a l... Trouble codes: P0133, P0130, P0420.
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