1990 gmc 1500

1990 GMC C1500
V8 • 4WD • AUTOMATIC
Avatar
JOSHL
  • MEMBER
  • 1 POST
my truck stopped blowing hot air what could be my problem
Jan 14, 2011 at 7:40 AM
Avatar
MMPRINCE4000
  • ✓Experienced Mechanic
  • 8,548 POSTS
Normally one would expect a thermostat, but with engine at temp, quickly touch the heater core hoses. If one is hot and one cold then heater core is blocked. If both are cold then thermostat.

Jan 14, 2011 at 7:45 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle