I have a 1999 GMC Safari Conversion van with a 4.3 engine. The blower control switch only works in the low position. Also when the A/C is on, it will blow cold while accelerating, After I'm at cruise speed it will stay cold for a couple minutes and then start blowing out warmer. If I slow down a bit and punch it back up to speed, it will start blowing cooler again. Thanks, John

SOURCE: 1998 gmc safari van

Check your spark plugs. That could be one of the reasons. Or are you sure you purchased the proper Fuel pump?

SOURCE: 2005 GMC air conditioning

hello wwwatkin,

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again, thank you,

drcool299

SOURCE: GMC Safari Van - Change spark plugs

i went under for driver side then i took off passenger side wheel you also have to remove two bolts that are holding dipstick tube in place it is easy to get them from the wheel well on passenger

SOURCE: I need to find and change the fuel pump relay on my 1993 GMC Safari. Any help?

I don't have the whole solution, but I do know that my fuel pump is in side the gas tank on my GMC Safari. Hope that helps!

Murtaza Akberali Versi

• 767 Answers
• Posted on May 09, 2009

SOURCE: Blower fan does not shut off and AC does not blow cold on MAX

It seems the AC switch is faulty maybe it doesn't contact the compressor wire on the MAX.
Check the switch.