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  1. #1

    Default 97 Suburban battery keeps dying and heat/ac blower stays on

    Two possibly unrelated problems with my 1997 Suburban. I replaced the battery back in August. Initially, if I hadn't driven the vehicle for a couple days the battery would die. Now it seems that I can jump it in the morning, drive to work, and when I get back to my vehicle 9 hours later it is dead. A couple weeks ago I did a draw test and I did not see an excessive draw. I think I was getting around 30 milliamps. Though I am not a mechanic so basically just googled the process. I think I'll give it another try today.

    Now on to my second issue which just started happening the other day. The blower is in the off position but it seems to be stuck in the high position.

    Any help with these two problems would be greatly appreciated. Thanks.

  2. #2


    Definitely double check your test for parasitic draw. I would suggest not to assume the battery is still good. I know I've had a lot of trouble with batteries (especially the low end no name brands) in my Suburban.
    '98 K1500 Suburban LS 5.7 L 4L60E NV246 ARB
    '92 Ford Explorer XLT 4x4 4.0 L A4LD BW13-54 Trac-loc rear
    "My toys were the greasy cogs and springs and pistons that lay around all over the place, and these, I can promise you, were far more fun to play with than most of the plastic rubbish children are given nowadays." Danny in Roald Dahl's Danny The Champion of the World

  3. #3


    Two types of blower speed control, one is the resistor pack that changes the voltage available to the blower motor. The other (which I think you have) is used on the auto HVAC controllers, it uses an electronic package to change the blower speed. The blower speed control module is available as a replacement part, or the existing assembly can be repaired (depending upon skill level). This is probably why the battery is flat.

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

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