Question about 2008 GMC Sierra 1500

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Sunroof does not work, When I replaced #34 30amp fuse in the underhood fuse block it sparked so I left it alone. I removed the fuse block to check the wires coming into #34. There is 1 red/wht stripe wire which is feeding the left hand spade(when viewed from above) In the row below there is a smaller red/white stripe wire feeding the row below the #34 socket. Can I bypass the fuse block by cutting the red/white stripe wire that feeds the spade of the fuse and adding an inline fuse and picking up power from the fuse block bus?

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Have the vehicle diagnosed by a certified electrical technician. DO NOT START CUTTING WIRES just to try and "bypass" the fuse. This fuse may be feeding more than one component and you could cause bigger problem.

Posted on Jun 14, 2014

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SOURCE: i have a 2007 gmc sierra and a 2004 chevy

be sure to check underhood fuse block fuses as well as IPC fuse block,LH side. there is a common fuse for both of the power port/lighter asm.

Posted on Sep 14, 2011

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Check 25A FUSE 34 in the underhood fuse block. Other than that, the sunroof switch or the sunroof control module could be at fault.

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Connector 1:
Fuse Block - Underhood Label (2.2L, 2.4L)
Connector 2:
Fuse Block - Underhood Top View (2.2L, 2.4L)
Connector 3:
Fuse Block - Underhood Bottom View (2.2L, 2.4L)
Connector 4:
Fuse Block - Underhood C1 (2.2L, 2.4L)
Connector 5:
Fuse Block - Underhood C2 (2.2L, 2.4L)
Connector 6:
Fuse Block - Underhood C3 (2.2L, 2.4L)
Connector 7:
Fuse Block - Underhood Label (2.0L)
Connector 8:
Fuse Block - Underhood Top View (2.0L)
Connector 9:
Fuse Block - Underhood Bottom View (2.0L)
Connector 10:
Fuse Block - Underhood C1 (2.0L)
Connector 11:
Fuse Block - Underhood C2 (2.0L)
Connector 12:
Fuse Block - Underhood C3 (2.0L)
Connector 13:
Body Control Module (BCM) Label
Connector 14:
Body Control Module (BCM) Top View
Connector 15:
Body Control Module (BCM) Bottom View
Connector 16:
Body Control Module (BCM) C1
Connector 17:
Body Control Module (BCM) C2
Connector 18:
Body Control Module (BCM) C3
Connector 19:
Body Control Module (BCM) C4
Connector 20:
Body Control Module (BCM) C5 (UE1)
Fuse Block - Underhood Label (2.2L, 2.4L)
2.2L

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2.4L

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Fuse Block - Underhood Label Usage (2.2L, 2.4L)
No.

Device

Rating

Description
1

ECM (2.4L)/TCM Fuse
10A

ECM (2.4L)/TCM
2-3

--
--

Not Used
4

RH HDLP Fuse
15A

Headlamp - Right
5

A/C Fuse
10A

A/C CLUTCH Relay
6-7

--
--

Not Used
8

ABS Fuse
10A

EBCM (JM4)
9

ECM/ETC Fuse
15A

ECM
10

EMISS Fuse
15A

EVAP Canister Purge Solenoid, Coolant Level Switch, MAF Sensor, HO2S 1, and HO2S 2
11
IGN Fuse
10A
ICM and PNP Switch (A/T)
12
--
--
Not Used
13
TRANS2 Fuse
10A
ECM, Automatic Transmission
14
TRANS1 Fuse
10A
TCM (MN5)
15
BACK UP Fuse
10A
PNP Switch (A/T) or Backup Lamp Switch (M/T)
16
INJECTORS Fuse
10A
Fuel Injectors 1-4
17
FOG LP Fuse
10A
FOG LAMP Relay (T37)
FOG LP Fuse
15A
FOG LAMP Relay (T96)
18
LH HDLP Fuse
15A
Headlamp - Left
19
WIPER Fuse
25A
WIPER 1 Relay
20
HORN Fuse
10A
HORN Relay
21
RADIO Fuse
20A
Audio Amplifier (UZ6)
22
ABS Fuse
20A
EBCM (JM4)
23
RR DEFOG Fuse
30A
REAR DEFOG Relay
24
A/C CLUTCH Relay
--
A/C Compressor Clutch

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Would a relay cause the sunroof not to open?


Yes it could. A blown fuse could as well.

Locate the sunroof fuse and relay int he fuse box (either underhood fuse box or interior fuse box). Check the fuse to see if it is good. You can swap the sunroof relay with another identical relay from the fuse box, if the roof now works, you know that the relay is bad.

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1998 Audi A4 quattro 1.8t windows and sunroof wont work but all the lights inside work what could it be


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I read over the recalls and they do have recalls on brake and turn signal lights but not the low beam headlights while driving at night.

Sounds like the relay or headlamp driver module relay 46, for the headlights is going bad, though.
Or, it could alternatively be bad grounding of wire somewhere or bad wiring in general.

I would check in the underhood fuse box for the relay and see if wiggling it to ensure a good connection helps matters.


Underhood Fuse Block 4.2L Engine Except Saab Underhood Fuse Block (2002 - 2005 Early Production) gm-06-42-1628.gif

Underhood Fuse Block (2005 Late Production - 2007) gm-06-42-1629.gif

Saab Underhood Fuse Block (2005) gm-06-42-1630.gif

Underhood Fuse Block (2005 - 2007) gm-06-42-1631.gif

5.3L Engine Except Saab Underhood Fuse Block (2003 - 2005 Early Production) gm-06-53-1632.gif

Saab Underhood Fuse Block (2005) gm-06-53-1633.gif

Underhood Fuse Block (2006 - 2007) gm-06-53-1634.gif

5.3L & 6.0L Engines Except Saab Underhood Fuse Block (2005 Late Production - 2007) gm-06-53-1635.gif

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Oct 13, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

Where is the fuse for the electric window ?


Step one is to check the 30 amp window/sunroof fuse in the underhood fuse box.

Do the windows not work from any of the switches?
Does the dome lamp work?
Does the sunroof work if you have one?
Have you tried swapping the window relay with another one of the same part number? The relays should be labeled on the fuse box covers as to which ones thay are. The relay should be in the right side fuse block in the car.

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