my 2005 GMC z71 would blink in 4wd and would go rite back into 2wd


Asked by Jan 09, 2014 at 08:00 PM about the 2005 GMC Sierra 1500

Question type: Maintenance & Repair

it would eventually go in after I drove it 20 miles or so, but it now does not at all blink in 4wd and a service 4wd message has appeared I have checked the switch and ive replaced the actuator none of them solved the problem please help

14 Answers


This has a module in behind the switch for the 4x4. I have replaced several for this concern. You will have to take it out and match the # to get a new one.

Best Answer

it will be behind the push buttons for the 4wd I the cab?


Is your push button on drivers side on the left of dash?


driver side. has auto 2wd, 4wd hi, 4wd low, in that order.


Yes,pull the switch and it is in behind down inside.It can be a bugger to change.


alright well I just polled my whole dash apart on the driver side and all I could see was an empty space I didn't see any modules


They have moved it then. Let me check and I'LL GET BACK.


ide appreciate that thank you, what does the module do anyway


It is still there in the same spot but hard to see. Crawl under the dash and look back UP towards the firewall.It's not very big. It receives signal from the switch to engage the transfer motor.


is it possible to show a picture because I just got under the dash and there was a lot of wires and stuff lol and I tried to fallow the wires from the switch to the wherever but I couldn't find anything


It is there, just harder than heck to see and get to. Look down in the dash on the left side and you can see just the edge of it.Look towards the door but down in the dash.


is it close to the fuse box inside the truck


Above it


ok im going to check it in the morning I appreciate all your help

Your Answer

Add photo

Related Questions

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 69,781 nationwide Sierra 1500 listings starting at $1,800.


Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
Reputation 5,100
#2 John Saffrahn
John Saffrahn
Reputation 3,560
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 3,240
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,831 Great Deals out of 182,473 listings starting at $1,595
Used Ford F-150
2,064 Great Deals out of 208,256 listings starting at $290
Used GMC Sierra 2500HD
111 Great Deals out of 13,293 listings starting at $2,650
Used Toyota Tundra
437 Great Deals out of 34,780 listings starting at $1,991
Used Dodge Ram 1500
430 Great Deals out of 10,966 listings starting at $1,000
Used Toyota Tacoma
501 Great Deals out of 42,074 listings starting at $1,995
Used Chevrolet Silverado 2500HD
271 Great Deals out of 28,148 listings starting at $2,500
Used GMC Yukon
390 Great Deals out of 20,076 listings starting at $2,495
Used Chevrolet Tahoe
585 Great Deals out of 32,524 listings starting at $1,500
Used Ford F-250 Super Duty
324 Great Deals out of 46,200 listings starting at $599
Used GMC Canyon
94 Great Deals out of 11,110 listings starting at $1,995
Used Chevrolet Colorado
246 Great Deals out of 25,671 listings starting at $1,000
Used GMC Sierra 1500HD
5 Great Deals out of 116 listings starting at $2,995

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
58 Great Deals out of 46,169 listings starting at $22,888
2016 GMC Sierra 1500 For Sale
84 Great Deals out of 3,540 listings starting at $17,671
2015 GMC Sierra 1500 For Sale
99 Great Deals out of 4,078 listings starting at $15,990
2014 GMC Sierra 1500 For Sale
101 Great Deals out of 4,210 listings starting at $14,495
2013 GMC Sierra 1500 For Sale
58 Great Deals out of 1,947 listings starting at $8,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.