Question about 1997 GMC Sonoma
Can not locate blend door actuator on my 1997 GMC Sonoma. Not getting heat inside the cab.
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Posted on Jan 02, 2017
On top of the transfer case is a vacuum switch with 3 vacuum lines connected to it. This switch controls when vacuum is applied to the vacuum actuator. This switch can fail partly and allow fluid from the transfer case to be sucked up into the vacuum lines and anything connected to them as well. When you replaced the actuator before, did you notice any oily fluid inside of it?
Posted on Dec 23, 2008
You should replace the handle with an aluminum version. The best one I have found is sold on eBay for 12 dollars.
Look for the one sold by mike8756.
It is easy to install, does not require removing any panels. Th first one I replaced took me about 1/2 hour. I hae done several since for friends and now takes about 15 minutes.
Installation instructions are here:
Posted on Mar 19, 2009
Pull plug wire and install a philips screwdriver into the plug wire get it 1/4 inch away from a good ground and crank the engine over, is there spark? if so check that you have fuel pressure buy renting a fuel pressure test kit from schucks or auto zone and turn the Key to run position with the gage hooked up, it should read 50 PSI turn key off and wait 20 seconds should still have 20 PSI of fuel pressure, if no fuel pressure check fuel pump relay, then check fuse to pump. if you have a bad relay and are not getting fuel then check the oil pressure switch to see if you have oil pressure at the switch if no pressure then the oil pressure safety switch has died and needs to be replaced and should stark after replacing. If you have fuel then check the timing to see if you slipped timing belt.
Posted on Jun 12, 2009
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