1988 GMC Sierra air conditioner has no power at dashboard display, no blower, no heater. Checked the fuse dasand it is okay. Found a relay on firewall, but how can I tell if this is problem?

Asked by Apr 10, 2014 at 02:53 PM about the 1988 GMC Sierra 1500

Question type: Maintenance & Repair

Checked the dashboard fuse and it is okay. Found a relay on firewall, but how can I tell if this is problem?

1 Answer

15

I had the same and turned out to be the controller module Had gone thru 2 then gm found a wire back feeding and blowing the unit. Had them run a new wire and put new controller in , no issues any more..... This is on my 97 gmc

Your Answer

Add photo

Related Questions

  • Why does my 1995 gmc Sierra have no Dash lights 3 answers

    was blowing fues right away found out had a after market deck problem rewired it now have tail lights not blowing fuese but no dash lights and power coming out of switch

    1995 GMC Sierra 1500

    -

    Maintenance & Repair

  • rough idle, stalling, loss of power. 225 answers

    o2 sensor code 44 (lean) Replaced: coolant temp sensor, tps, map sensor, fuel filter, and o2 sensor. It will run normal on occasion but only lasts about 45 seconds or so. I don't think its the torqu...

    1995 GMC Sierra 1500 K1500 SL 4WD Extended Cab Stepside SB

    -

    Maintenance & Repair

  • Rough Idle/No start 5 answers

    Okay guys, so my truck has been sitting since May of this year, and it broke down while I was driving about 200 miles from home. So obviously, it was running well and I didn't think there were any ...

    1996 GMC Sierra 1500 C1500 SL Standard Cab LB

    -

    Maintenance & Repair

  • No heat any ideas? 7 answers

    Ive got a 95 gmc 1500. I recently replaced the heater core along with the hose from the core to the water pump and hose assembly to the block. I have no heat and my fan will blow light at time th...

    1995 GMC Sierra 1500

    -

    Maintenance & Repair

  • no power 2007 yukon xl denali 48 answers

    intermitent no power last couple of days, decided to replace original battery. still no power.

    GMC

    -

    Maintenance & Repair

Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 4,500
#2 John Saffrahn
John Saffrahn
Reputation 3,150
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 2,740
View All

Related Models For Sale

Used Ford F-150
3,332 Great Deals out of 203,178 listings starting at $1,273
Used Chevrolet Camaro
644 Great Deals out of 39,204 listings starting at $2,995

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
7 Great Deals out of 27,381 listings starting at $23,800
2016 GMC Sierra 1500 For Sale
75 Great Deals out of 7,214 listings starting at $19,400
2015 GMC Sierra 1500 For Sale
189 Great Deals out of 4,546 listings starting at $15,999
2014 GMC Sierra 1500 For Sale
180 Great Deals out of 4,427 listings starting at $14,971
2013 GMC Sierra 1500 For Sale
133 Great Deals out of 2,579 listings starting at $10,995