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Click on image for the lowdown. 
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| | | Forums66 Topics128,049 Posts1,055,634 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | I don't know how your year of truck is wired but based on the AD trucks, a heater motor drawing too much current could damage the supply to the ignition switch and/or the switch itself. It might be a good idea to see if your ignition switch is getting hot when you put the heater on. You can also measure the feed voltage to the coild when the heater is turned on. | | |
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