help with heater on a 97 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

EyeH8the24 · 12-03-2008, 07:46 PM

my 97 s10 with a 4.3 dunno if that matters wont blow thru the vents ...only on defrost ,any help is apprecitated

68C15 · 12-04-2008, 07:52 AM

sounds like you lost vacuum to the controls. defrost is the default position.
it feeds from the center drivers side of upper intake to a check valve between the booster and fender. there it branches off to the TX case, front axle actuator and another line leads to the interior. also make sure the hose at the reservoir is OK.

EyeH8the24 · 12-07-2008, 12:37 PM

the resivoir hose was toast .....replaced it and it works thanks !

12-03-2008, 07:46 PM	#1
EyeH8the24 Registered User Join Date: Dec 2004 Location: beulah,alabama Posts: 1,075	help with heater on a 97 my 97 s10 with a 4.3 dunno if that matters wont blow thru the vents ...only on defrost ,any help is apprecitated

12-04-2008, 07:52 AM	#2
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	Re: help with heater on a 97 sounds like you lost vacuum to the controls. defrost is the default position. it feeds from the center drivers side of upper intake to a check valve between the booster and fender. there it branches off to the TX case, front axle actuator and another line leads to the interior. also make sure the hose at the reservoir is OK.

12-07-2008, 12:37 PM	#3
EyeH8the24 Registered User Join Date: Dec 2004 Location: beulah,alabama Posts: 1,075	Re: help with heater on a 97 the resivoir hose was toast .....replaced it and it works thanks !



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