05 tahoe, loose all power for a split second

[mkatts]

:nonod:
No dice again. Back to the dealer...again.

 

[Rivieraracing]

That sucks man, I hate to give up on stuff myself but in this situation I would be thinking about trading your truck in for another one. They have so much electronics in these trucks and if the stealership can't figure out the problem at least the first or second time in to them, then you may always be taking it in to be fix as well as burning the money out of your wallet every chance you truck gets. I bought my used '02 yukon just this last summer, and even though I have had to fix a few things that have come up, the thing drives great. Good luck!!

 

[mkatts]

I am thinking the same thing. Probably why it was traded in to begin with.

 

[wannabefastss]

xTooltipElement Service Information 2003 GMC Truck Yukon Denali | Avalanche, Escalade, Suburban, Tahoe, Yukon (VIN C/K) Service Manual | Document ID: 1869994
--------------------------------------------------------------------------------
#PIP3089B: SES Light And Reduced Engine Power DTC P0120 P0220 P1516 P2135 - keywords accelerator actuator APP blade body connector connection DTC L33 L59 LH6 LR4 LM7 LS1 LS2 LQ4 LQ9 module position reduce sensor - (Oct 31, 2006)


Subject: SES Light and Reduced Engine Power DTC P0120 P0220 P1516 P2135


Models: 2004-2006 Buick Rainer

2005-2006 Cadillac CTS-V

2003-2006 Cadillac Escalade

2003-2006 Chevrolet Avalanche, Corvette, Express, Monte Carlo, Silverado, SSR, Suburban, Tahoe, Trailblazer

2003-2006 GMC Envoy, Savana, Sierra, Yukon

2003-2006 Hummer H2

2005-2006 Pontiac GTO

Equipped with a 4.8 5.3 6.0 or 7.0 V-8 Engine




--------------------------------------------------------------------------------

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
A vehicle may be brought into the dealer for a reduced power message, and DTCs P0120, P0220, P1516, P2101, or P2135.

The Throttle Actuator Control (TAC) / throttle body type trouble codes, may be caused by a loose wiring crimp at the throttle body connector, or a broken throttle body circuit.

Recommendation/Instructions:
Complete the current SI diagnostics for any symptoms or trouble codes found. If a intermittent T/P or TAC module type code is occurring complete the inspections below.

Inspect all related throttle body terminals for a loose wiring crimp. The loose crimp may be difficult to find, and the poor connection will be between the terminal and the copper strands of the wire. Wiggle test the individual throttle body circuits to see if the concern can be duplicated.
Inspect the related circuits for broken wires inside the insulation. The outer wire insulation may look fine, but the internal copper strands may be partially broken. Breaks in the wires usually occur within 1 to 4 inches of the throttle body connector. Wiggle testing may also induce a trouble code to set.
On C/K trucks complete SI procedures for voltage drop on grounds G103 and G104. Grounds G103 or G104 may be loose or corroded.
If a terminal crimp or a broken wire has been found, repair or replace only the circuits involved. There is a throttle body pigtail connector available through GMSPO, but installing this pigtail connector may cause other intermittent TAC module/TP codes at a later date. If this pigtail must be used, please follow the SI procedures for Splicing Copper Wire Using Splice Sleeves. (the proper Kent-Moore crimping tool must be used for this repair)

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


© 2008 General Motors Corporation. All rights reserved.

this is exactly the reason why not everyone should be techniciain. i've been working on cars all my life, and it sucks to go to a dealership and see this young kid who went to this a tech school and got cert. and has never hardly turned a wrench. but thats the way it goes. i should have gotten cert. myself

 

[wannabefastss]

the messages in this bullentin are to scare people from working on them, don't want give out all of GM's little secrets.

 

[brodg]

ok i see you have been through all of the tac module diagnostics. i am positive at this point that you have a bad connection at the tac module. the only way to repair it is to replace the tac module pigtail connector. this has to be soldered in order to not give you anymore problems.
believe me i know this from experience and if it isn't soldered it will act up again.

 

[mkatts]

Do you by chance have a part number for the pigtail? I am an electronic engineer and soldering is second nature to me. By the way, the "TAC" module is the servo motor on the throttle body correct? Or is it the module on the accelerator pedal?
Thanks!

 

[brodg]

the tac module is part of the throttle body. the part number i do not know off the top of my head but i do know it is about 165.00. your local gm dealer should be able to look it up.

 

[mkatts]

The pigtail is $165???
Or the throttle body is $165

 

[brodg]

hate to tell you this but the pigtail is around 165.00

 

[mkatts]

What would the proper name be? I have tried searching around the internet with no luck.
Thanks again!

 

[brodg]

try connector,harness, i'll get the part# today and who makes it

 

[mkatts]

thanks!

 

[arnel]

I'm having the same problem

I have a 2003 suburban and over the weekend it started giving me this problem (reduced power). What is the partnumber for the TAC Module? And where is it located at?

Thanks,
Arnel

 

[-1badr6-]

I am having this same problem with my '03 Yukon Denali.

Anyone find the fix?