Why does my heat stay on defrost all the time. Duel control doesn't work. Vent control doesn't work too. Wy?

Asked by Apr 14, 2016 at 04:48 PM about the 2004 Chevrolet Silverado 1500 LS Ext Cab Short Bed 2WD

Question type: Maintenance & Repair

Air and heat panel

2 Answers

22,475

check for a vacuum leak...

90,545

If your is digitally controlled you may have a failure in the main control unit, it is uncommon that every position has failed on a digital unit. However if it is manual control then Kelly is spot on about loss of vacuum, on a manual unit when vacuum is lost default mode is defrost.

Your Answer

Add photo

Related Questions

Search Chevrolet Silverado 1500 Questions

Chevrolet Silverado 1500 Experts

#1 John Carson
John Carson
Reputation 2,110
#2 Rowefast
Rowefast
Reputation 1,790
#3 Silverado_owner_2006
Silverado_owner_2006
Reputation 1,610
View All

Related Models For Sale

Used GMC Sierra 1500
835 Great Deals out of 66,316 listings starting at $1,995
Used Ford F-150
2,240 Great Deals out of 209,421 listings starting at $1,499
Used Dodge Ram 1500
429 Great Deals out of 11,320 listings starting at $1,000
Used Chevrolet Silverado 2500HD
316 Great Deals out of 26,878 listings starting at $1,250
Used Toyota Tundra
474 Great Deals out of 33,288 listings starting at $3,305
Used Toyota Tacoma
481 Great Deals out of 39,055 listings starting at $2,900
Used Chevrolet Tahoe
555 Great Deals out of 27,465 listings starting at $999
Used Chevrolet Colorado
229 Great Deals out of 23,556 listings starting at $2,200
Used Ford F-250 Super Duty
353 Great Deals out of 47,662 listings starting at $1,795
Used Chevrolet Silverado 2500
8 Great Deals out of 290 listings starting at $3,000
Used Ford Mustang
364 Great Deals out of 46,976 listings starting at $1,500
Used Chevrolet Silverado 1500HD
13 Great Deals out of 269 listings starting at $3,950

Used Cars For Sale

2017 Chevrolet Silverado 1500 For Sale
49 Great Deals out of 113,740 listings starting at $20,499
2016 Chevrolet Silverado 1500 For Sale
137 Great Deals out of 6,081 listings starting at $18,190
2015 Chevrolet Silverado 1500 For Sale
172 Great Deals out of 7,316 listings starting at $15,888
2014 Chevrolet Silverado 1500 For Sale
285 Great Deals out of 10,389 listings starting at $9,988
2013 Chevrolet Silverado 1500 For Sale
166 Great Deals out of 5,143 listings starting at $6,900