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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 5, 2013
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Open Help Requests for GM
Help Request Answers
1997 Chevrolet K1500 Cheyenne 5.0L High Idle VIN: 1GCEK19M2V
This truck will idle fine while sitting still but when moving over 5MPH it idles at 1900 to 2000 rpm even when in N coasting. My Question, is this an IAC problem or a PCM problem.
1999 Chevrolet Tracker 2.0L No Start VIN: 2CNBJ18C0X
hello fellow techs, i have this tracker with no spark or injector pulse. i just installed a used engine after truck had been sitting for 3 months and now engine will not start i have no injector pulse,or spark. i checked all the power and grounds at pcm,i chec...
2001 Chevrolet Suburban 1500 5.3L cylinder head VIN: 3GNFK16T41
Hello all. I've got a GM 5.3L in the shop with cracked castech heads (leaking around drainback holes like always). My question is a bout remanufactured heads. I ordered two rebuilt heads from ATK. One of them is also a castech. ATK claims that they can fix the...
2001 Chevrolet Tracker LT 2.5L speedometer, coolant guage VIN: 2CNBJ63441
hey guys i was handed this vehicle from another shop speedometer doesnt work till you touch the brake pedal lightly then it will work and coolant guage maxes out to hot.you can also move the shifter through the gears and make the temp guage go up and down have...
2001 GMC Yukon XL 1500 SLT 5.3L a/c VIN: 3GKFK16TX1
I replace the high side a/c switch, charge the a/c and notice that when runnig the high side pressure 350 to 400 psi, and then i spray water on the a/c condensor, pressure drop to 200 to 250 psi
1996 Oldsmobile Cutlass Ciera 3.1L MIL Lamp on VIN: 1G3AJ55M9T
Howdy Y'all! Got a messy one here 1996 Ciera 3.1 sets code p0336. When monitoring the 24x signal on scanner it is very erratic. Another shop put on the rear crank sensor and it was still bucking and surging. We put on the front crank sensor and NOW IT RUNS SMO... Trouble codes: P0336 (Crank sensor a 18/24 signal), P1673 (Engine hot lamp circuit)
1990 Pontiac 6000 LE 3.1L braking VIN: 1G2AF54T1L
customer complaint brakes grabbing. worse the wetter it gets. checked all brakes everything still like new I have seen this problem on countless GM vehicles. but have never had anyone want to fix the problem. when the brakes are applied it acts like only the r...

Fixes & Summaries for GM
Fix/Summary Answers
2004 Buick Rainier CXL 4.2L Transfer Case VIN: 5GADT13S74
First of all I would like thank everyone that offered help. This vehicle has the fully automatic AWD system. All tires were the same diameter and I checked the wiring harness for any problems. I am fairly positive the ECCM is bad. The owner of the dealership c...
2004 Chevrolet S10 LS 4.3L Fuel Fill VIN: 1GCDT13X14
Thank you for the help. it was the valve in the fill neck. cleaned it out and all is well .
2005 Chevrolet Colorado Z85 LS 3.5L wheel bearing VIN: 1GCDT14625
Thanks for the info I will try to change there minds. Feel free to add anything.
2001 GMC Sierra 3500 SL 6.6L No Start, Cuts out, Stall VIN: 1GTJK34111
Long story short sealed up some fuel leaks and replaced the FICM with a used unit. Truck runs but continues to overheat due to blown head gaskets. Customer paid 3k for the first injector sleeve job, we felt bad so let him leave for 1500 Trouble codes: P0463, P0540, U1800 (Lost Comm with FICM).
2003 Pontiac Grand Am GT 3.4L Misfire VIN: 1G2NV52E23
Harmonic Balancer Ordered a new balancer and compared to original, reluctor ring was not aligned the same. My guess is when a code is set from EGR or 24x being unplugged it only uses the 7x CKP to control timing/injection. Even though the 24x sensor ...
2007 Pontiac Grand Prix 3.8L engine VIN: 2G2WP55227
Hey guys, Sorry for the delay in getting back about this vehicle but I wanted to give it a few days to make sure it didn't return. First thanks to the great response from everyone and all the help. In addition to everything we did listed in the original post I...
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