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Prev Professional Automotive Repair Technical Discussions for February 3, 2007
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Open Help Requests for GM
Help Request Answers
2001 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP54K21
hello everyone i have a problem thats got me stumped. this 01 buick came into the shop a couple of days ago with a no start. another tech was looking at it and couldnt figure it out so he asked me to take a look. it had no spark so i went right to the known 3....
2002 Cadillac Escalade 5.3L heater core VIN: 1GYEC63T82
vehicle originally came in with leaking water pump. replaced with ac delco water pump. customer states that a noise developed under dash after pump was replaced. we were able to confirm noise. when decelerating from above 2,000 rpm we hear a "whoop" noise comi...
1994 Chevrolet K1500 Cheyenne 5.7L Hesitation VIN: 1GCEK19K4R
Vehicle came in with a very bad hesitation and slowing down the faster you tried to go. I tested the computer with no codes showing up.Tested fuel pressure to find it @ 13.0 lbs. koer. When you test it @ koeo it immediately fell to 0 psi. after peaking @ 13.0....
1994 Chevrolet Astro 4.3L overheating VIN: 1GCPM19Z3R
this van came in with no thermostat.had new engine from dealer 3 years ago. customer say temp gauge awys stay low.and no repair has been don after engine was replaced.i think dealer had overheating after engine replac. so they removed thermostat . put new ther...
1995 Chevrolet Blazer 4.3L Hesitation, Surge, MIL Lamp on, NO ACCELERATION VIN: 1GNDT13W8S
car has been giving me problems lately. acceleration is fine but at about 60-70% throttle the rpms go up and the mph go down. its like the car wont accelerate at all. as you let up on gas it catches, and starts to acclerate. this morning i popped a code (po131... Trouble codes: P0131
1997 Chevrolet K1500 Suburban 5.7L pump VIN: 3GNFK16R1V
Ever since you worked on it...Well this is our family suburban and it started out with a worn out alternator. I disconnected the battery,replaced the alt and slipped the belt back on. Started her up and check the voltmeter-A-OK This is where my simple weekend ...
2000 Chevrolet Blazer LS 4.3L No Start VIN: 1GNCT18W2Y
Truck towed in no start. Finding 3 problems. With fuel pressure guage hooked up, turn key on and pressure goes to 65 and immediately drops to 0. Then when I turn key off, fuel pump energizes again going to 65 and dropping to 0. Turn to on and nothing. Every ti...
2001 Chevrolet Suburban 2500 8.1L Fuel Gauge VIN: 3GNGK26G91
Fuel gauge reads empty and warning lamp for low fuel is on when vehicle comes to stops. As soon as you start moving gauge will register again and low level indicator goes off. We bought brand new pump assembly from dealer, installed and had same results. Pulle...
2001 Chevrolet Monte Carlo SS 3.8L Catalytic converter VIN: 2G1WX15K51
Plugged cat. con. in 4/06. Hole was blown in intake manifold. MAP ssensor replaced. Upper intake replaced. Cat. con. replaced with OEM weld in. Car ran fine for approx. 1200 miles when check engine light came on. Car running fine. Scanner shows catalyst effici...
1998 GMC Sonoma SL 2.2L int bat VIN: 1GTCS1441W
Hello everyone, I have this 98 gmc in the shop with a draw on the battery. Lets start from the top. truck was towed in with dead battery, cust installed new battery and in less the 2 days dead. also has service eng soon lamp on. Started by charging batt for 24...
2000 Pontiac Bonneville SE 3.8L door locks,power windows,power mirrors VIN: 1G2HX54K2Y
Power windows,locks,door mirrors are inop. I beleive problem is related to body control module. I have replaced body control module with one from salvage yard(same part #)Will this work,or do I need to buy new one from gm and have them flash it? Can they refla...
1997 Saturn SL2 1.9L Heating system VIN: 1G8ZK5278V
The hose feeding the heater core is coming to proper temp. The hose coming out of the heater core is tepid. That hose is tepid all the way to the overflow bottle, where it tees into it. At first a restricted heater core was suspected, but backflushing it, and ...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Cadillac DeVille 4.9L Excessive Emissions VIN: 1G6CD53B8P
Thank you for all the help. The MAT senor was melted giving me false readings. I replaced and the computer leaned out and closed the loop. Thank you again for all your help!!!
1992 GMC Sonoma SLE 4.3L hard start VIN: 1GTDT19Z8N
Thanks to all who replied. This one was a bit puzzling. After checking amperage draw on all output devices as suggested and coming up with no obvious problem, I started checking inputs to the ecm. Ultimately, I found that while backprobing and monitoring the O... Trouble codes: 55 (prom fault), 54 (fuel pump circuit low).
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