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04 Yukon Denali CEL Codes Galore
Apparently the stealership said the truck does not have not TAC module. Very bad attitude like they know everything. Anyhow found one of a 04 yukon same part number and barcode number. But waiting on splicing the connector harness as well. I opened up the OE TAC module but nothing looks burned...- 04YukonAWD
- Post #18
- Forum: Engine & Drivetrain
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04 Yukon Denali CEL Codes Galore
The connectors on the wires looked okay but the actual connections on the TAC module smell burnt. I want to break it apart and see if theres any burned circuit boards or water in it.- 04YukonAWD
- Post #16
- Forum: Engine & Drivetrain
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04 Yukon Denali CEL Codes Galore
Yes sir I did and the TAC harness looks decent not cracked or weathered. The TAC module apparently had a cracked down the middle that might have caused water to sweep thru and fry it. The connectors do have a burned smell to them. The BIG question is does the TAC module part number...- 04YukonAWD
- Post #14
- Forum: Engine & Drivetrain
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04 Yukon Denali CEL Codes Galore
Ok guys just trying to get some insight on the issue. Replaced TPS replaced TPS Harness replaced the Pedal Sensor and still the problem is there. All old sensors works as good as new ones. Is there a TAC module somewhere that may need replacing?- 04YukonAWD
- Post #12
- Forum: Engine & Drivetrain
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04 Yukon Denali CEL Codes Galore
I really do hope its something simple as a wire or at most the pedal sensor. I will check the pedal sensor and harness first since that would be a start.- 04YukonAWD
- Post #9
- Forum: Engine & Drivetrain
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04 Yukon Denali CEL Codes Galore
Got home after 2hrs of having the battery disconnected and CEL and Reduce Engine Power are still there. ---------- Post added at 08:59 PM ---------- Previous post was at 08:57 PM ---------- Got it. I will check the voltage with the multimeter and check each pin. What am I suppose to get across...- 04YukonAWD
- Post #7
- Forum: Engine & Drivetrain
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04 Yukon Denali CEL Codes Galore
Yesterday I swapped throttle bodies from a 05 Silverado to the yukon and the problem was still there. The throttle butterfly opens and closes freely and also moves when it clicks right before starting the engine. My guess is that it maybe the accelerator pedal of some sort. With a test...- 04YukonAWD
- Post #5
- Forum: Engine & Drivetrain
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04 Yukon Denali CEL Codes Galore
Sounds like its worth a try. I have also done the wiggle test with no wires feeling loose or have any play either.- 04YukonAWD
- Post #3
- Forum: Engine & Drivetrain
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04 Yukon Denali CEL Codes Galore
Hey guys I have a 2004 GMC Yukon Denali that has the dreaded Reduce Engine Power message on along with the CEL T/C light. As I carry a obd2 scanner i checked the codes and have 4 codes, P2135 P0120 P0220 P1516. I am lost here on what to check. I switched throttle bodies from a silverado...- 04YukonAWD
- Thread
- Replies: 41
- Forum: Engine & Drivetrain
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04 GMC Yukon Denali Cracked Differential
Well the inevitable happen and found out I had a cracked front differential. The crack is on the passenger cv axle tube or housing however it's called. I have called a few junkyards with no luck on finding a AWD diff. Is it possible to replace JUST the passenger axle tube from that of a...- 04YukonAWD
- Thread
- Replies: 0
- Forum: Engine & Drivetrain
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04 Yukon Denali Broken Differential
Well the inevitable happen and found out I had a cracked front differential. The crack is on the passenger cv axle tube or housing however it's called. I have called a few junkyards with no luck on finding a AWD diff. Is it possible to replace JUST the passenger axle tube from that of a...- 04YukonAWD
- Thread
- Replies: 1
- Forum: Engine & Drivetrain
