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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 31, 2014
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Open Help Requests for GM
Help Request Answers
2005 Buick Terraza CXL 3.5L Stall, MIL Lamp on, reduced engine power VIN: 5GADV33L05
This vehicle original came to us with a "reduced engine power" message and a code p0068. We replaced the throttle actuator, cleared codes and delivered the car. About 2 weeks later, the car wouldn't start and had the reduced engine power massage again. this ti... Trouble codes: P0068
2005 Chevrolet Corvette 6.0L converter VIN: 1G1YY24U35
Good morning everyone, I'm just looking for any insight for an automatic transmission replacement. Can it be done without removing the torque tube? Are there any short cuts,cautions that aren't in the GM manual? Any help would be appreciated. [small town shop,...
2008 Chevrolet Uplander LT 3.9L Electronic VIN: 1GNDV33138
Hello, have this uplander that sets codes b0418, b0428 and b3532 all at the same time. Replaced the rear mode motor,rear temp motor and passenger front temp motor.not sure why it keeps setting codes for 3 motors when only one at a time moves.if i adjust knob f...
2014 Chevrolet Corvette Stingray 6.2L Monitor status VIN: 1G1YK2D75E
So my Dad just bought a new corvette from the east coast and had it shipped out here to California. Cali requires this car to be smogged now. For the life of me, I can not get all the monitors to run. All but evap and o2 have run. Anyone out there have any s...
1992 GMC C3500 Sierra SLE 7.4L tcc VIN: 2GTHC39N4N
The problem with this truck is the computer at highway speeds turns the TCC off and on causing a surge and engine speed fluctuation. This customer brought this truck to us after several other shops. To try to correct the problem he has replaced the transmissio...
2005 GMC Savana 2500 4.8L 1-2 Shift, 2-3 Shift, Converter Clutch VIN: 1GDGG25V65
Good Day, This vehicle has consistently come back with returning codes for 1-2(A) shift solenoid, 2-3(B) shift solenoid, and Converter Clutch pressure control solenoid. I have Ohm'ed every wire from the transmission to the PCM (they were all good,) and traced...
2005 GMC Sierra 2500 HD SLE 6.6L Egr VIN: 1GTHK23215
What would make fuel leak from the EGR electrical connector?
2003 Hummer H2 6.0L Brake Pedal VIN: 5GRGN23U23
We recently replaced the Power Steering Pump and Both Power Steering Hoses connected at the Pump. Since then the brake pedal seems to have about 1 inch of free travel before there is resistance in the pedal. Brakes seem to work normally otherwise. The brake pe...
1966 Pontiac GTO 6.4L tach
looking for old school tech.need some help.helping friend with his 66 gto. has point's ignition.he sent his dashboard tachometer out to be checked and fixed twice.when he bought the car tach didn't work.he sent it out to be checked and fixed.he had someone wor...
2005 Pontiac G6 GT 3.5L output shaft seal VIN: 1G2ZH52865
This one was in to replace transmission valve cover and wiring harness and all switches accessed behind this cover, customer cracked cover when removing axle and removed cover and knocked harness and shift switches in the process, all functioned, but replaced ...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Chevrolet Blazer LS 4.3L Surge
I want to thank everyone for their help. I performed a back pressure check as everyone had suggested. It had 2-4 lbs at 2000rpm(1.25 max is spec.) If I power brake at 2000 rpm then it shoots way up. I also did a post cat-less then .5LB at any rpm. Replaced Y P...
2001 Chevrolet S10 4.3L engine VIN: 1GCCT19W31
after complete tear down and machine shop inspection found valve guides and cam bearings severely worn cust went with new long block for repair.
2006 Chevrolet Trailblazer SS 6.0L Stabilitrak VIN: 1GNET13H16
I replaced the steering angle sensor and the left front wheel speed sensor with the same results. It was the right front wheel speed sensor. I found it by using a Tech2 in the snapshot mode using the live graph feature. The right front sensor would drop out. T...
2006 Chevrolet Cobalt LT 2.2L Hi Speed BUS VIN: 1G1AL15F96
Good afternoon, what I found was the ignition switch that the customer had installed was the culprit. I had to purchase a new switch from the dealer, programmed the system and the vehicle started right away. thanks for the help.
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