'98 GMC Jimmy issues?

[spottedtrotter]

I have a '98 GMC Jimmy SLT that runs really good minus a few things. Number one and probably the most important the heat blows out constantly and the faster im going the faster it blows out. If I'm driving down the interstate going 75 it's blowing out like I have it on full fan when it's turned off. And no cool air will come out what so ever except maybe once in a blue moon.

Secondly, theres this really annoying ticking sound in my dash like I've left the signal on but it just doesnt go away until I apply the brakes. This gets really annoying really fast if your in the car for a long period of time.

And then lastly the speakers in my car are like crazy the right front side always works but none of the other speakers come in. The back left works on occasion but it's not reliable.

If you have had the same problems or have any answers please give me your advice.

 

[98JimmyKat]

I just took my 98 jimmy into the shop for that annoying ticking noise, sounds like blinker left on, and it stops when brakes applied. And of course, when they test drive it it doesn't do it all the time like it does when i drive it....mine didn't start happening until i tried my cruise control. Mechanic said that its probably the switch for the cruise control, since they all (cruise, turn signals, flashers..) run on same fuse/switch. He told me putting a new fuse should fix it. Will know Thursday. The guy who owned the jimmy before me put in a cd player and did a crappy job...but at one point all the speakers worked and now i am down to just 2, the left door speaker and the cargo right one...but i have a stereo/speaker installer in my home and she is skilled with wiring and all that in between, so she is going to fix it for me....I have 8 speakers, and i need my tunes...but it sucks with just 2...check the wires to all your speakers, and then the connection from them to your stereo. I am going to put my own Pioneer system in mine, the guy before me had an older stereo put it, the damn cd player quit working and one of my favorite cds is stuck in it. Hope I could be some help.

 

[Molson02536]

1998 GMC Jimmy Car Stereo Installation Diagram

Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 6 1/2″
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: 6 1/2″
Car Audio Rear Speakers Location: Rear Doors
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

 

[barks507]

I have the same annoying ticking sound in my 98 Jimmy. I was told to check all the ground wires under the hood. Did that but, didn't help. The other day I put my turn signal on and smoke started to come out from steering column. So I am assuming, like you were told, it is the switch for cruise, signals, wipers, etc....I will be looking into it further in the very near future.

On another note. Can anyone tell me exactly where the gas line runs (is it inside the frame beam) from tank to engine. I can smell gas and I remember reading recently that the lines can corrode where they attach to body. Well it's winter here in Ontario and the truck's underbody is always wet so, it is very difficult to trace leak.

Cheers
Great forum. I don't post a lot but read a lot.

 

[Molson02536]

You gas line runs along the top of your frame on the drivers side between the body and frame. It's common for the line to corrode where the plastic clips holds the line to the frame right by the rear door area. You can pop the line up off the clip, cut out the bad part with a small pipe cutter and section it off the repaired area with rubber fuel injected hose. Make sure it's fuel injected hose you use and not just normal rubber fuel line hose and use compression clamps when clamping the hose to the line. Try not to make the rubber hose line longer then 3 inches. I just replaced my fuel line on my 96 by sectioning off the whole line along the fame with nylon fuel line and used compression fittings. NAPA carries these fuel line. Here is a link that should help you, its what i used. http://www.fmsiinc.com/Default.htm