no heat;Trans Problem 99 GMC Sierra;Alittle Help Here Please;89 K2500 Hood wont open;engine block heater..
no heat

i have a 95 silverado z-71 and my heater producess a little heat and it sucks when its cold out and my coolant is all top out and so is my overflow as well can anyone tell me what the prob might be like a clgged heater core or what .
1.Cheek that the heat controller is really opening the heater.
2. think thermostat.
1.Cheek that the heat controller is really opening the heater.
2. think thermostat. i changed my thermostat this summer, and how do i check for the heat controller if it is opening up?
Are the both hoes for the heater core getting hot?
Next you need to look for any actuators for your hearer box. is there an in-line valve on one hose? IS it open or closed? Is the door in the hearer box (the one that controls the defrosters, vent heat) jammed shut from sh!!?
Is air flowing throught the heater?
Also is the blower motor working??
I had this problem with my 91 GMC. About every two years. I took the hoses off the core and back flushed the core with the garden hose. it works great after this every time.
Joe
i have a 99 z-71 with the exact same problem the blower blows strong its just a little if any heat comes out. could you guys clearify how to fix this problem... thanks
I would highly recommend changing the thermostat.
They're cheap and easy to replace.
Before you install the new one, wait til the little lady is gone and boil some water in one of her fine sauce pans. Make sure the thing opens up.....save some headaches in case its defective.
Your Heater core is most likely clogged up if everything else is ok. Take both hoses that lead to the heater core off, flush directly with running water through both hoses(1 at a time) You will not beleive the crap that comes out. next time you turn on your heater , watch out, it will dam near burn your hand:yow!:
hey 572 just wondering if you were able to fix your heater problems?? i just finished flushing out my heated core- a bunch of **** came out of it. did not test to see if it fixed the problem yet(didnt want to wait for the truck to warm up) ill let you know if it worked alittle later tonight after i get home from work
Your Heater core is most likely clogged up if everything else is ok. Take both hoses that lead to the heater core off, flush directly with running water through both hoses(1 at a time) You will not beleive the crap that comes out. next time you turn on your heater , watch out, it will dam near burn your hand:yow!: ok so drain my coolant out andtake them both off do i leave them connected to the truck or take them both out of my truck ?
ok well i flushed my heater core and i have no teated it yet to c if it works and i did change my thermostat this summer but it could be a defected one but i will let u guys no if that worked or not
Trans Problem 99 GMC Sierra

Trans Problem 99 GMC Sierra 2500 --------------------------------------------------------------------------------
One of my guys made the mistake of shifting the trans into 4wd while the truck was moving and in Drive. Now the front end is vibrating when traveling about 25 mph or more, sounds like something is grinding. It is OK when truck is switched out of 4 wd into 2 wd. What could this be? It is a 99 GMC 2500 Sierra. What might it cost?
More snow tomorrow, need help. Thanks
Could potentially be a transfer case problem, it's difficult to diagnose something like this without actually seeing the vehicle.
Shifting on the fly should not cause any problems. Check wheel balance wieghts.
Check front U joints, that truck should be able to shift on the fly! Is it the old body style or the New body style! My 1999 old body style, i can throw into 4x4 on the highway!
Alittle Help Here Please

I own a 1990 GMC 3/4 T Suburban SLE/350. Last winter we decided to have a (astrostart) remote starter installed. Ever since I had this unit installed the driving lights won't come on until the interior of the truck is warm. I had it professionally installed, and at first questioned them and they actually took the switch out and sprayed it with some sort of cooling agent, and then showed me that it wasnt functioning properly. Prior to this installation I never had a problem. Last night I decided to turn the remote off under the dash, and to my suprise the lights still wouldn't come on. These switches are pretty much standard equipment at any auto parts store. I tend to think that they all cant be made like this otherwise we would have alot of people not being able to drive around until the trucks warm up.. (ANYONE EVER HAD THE SAME PROBLEM):cool:
I own a 1990 GMC 3/4 T Suburban SLE/350. Last winter we decided to have a (astrostart) remote starter installed. Ever since I had this unit installed the driving lights won't come on until the interior of the truck is warm. I had it professionally installed, and at first questioned them and they actually took the switch out and sprayed it with some sort of cooling agent, and then showed me that it wasnt functioning properly. Prior to this installation I never had a problem. Last night I decided to turn the remote off under the dash, and to my suprise the lights still wouldn't come on. These switches are pretty much standard equipment at any auto parts store. I tend to think that they all cant be made like this otherwise we would have alot of people not being able to drive around until the trucks warm up.. (ANYONE EVER HAD THE SAME PROBLEM):cool:
Kingriver,
I think your "professional" installer, didn't do a professional job. The Installer definitely didn't wire the remote starter properly.
I do believe the Chevy alarm system is built into the factory radio and something is just not right on your truck.
Take it back and demand the problem is fixed.
John
I posted in your other thread also, but I'd look into your remote start as I have an identical truck with no such problem.
Some auto start systems get the car running, but don't "activate" all systems. I had one on a Ford several years ago and although the engine was running, the heat wouldn't come on nor would the battery charge until I put the key in. Weird.
89 K2500 Hood wont open

Hello, I have a broken hood release cable,how without cutting my hood open do I release it?
Thank You.
Allan
well, it all depends on were the cable broke, did it brake under the dash.... but one way to get it open is, if you look behind you grill , you should see the cable going to your hood, make sure its the cable and not wires!!!!!!!strip some of the outer cable off, and take a pair of pliers and pull on the cable till it opens. if that doesnt work take your grill off and unbolt the hood latch from the rad support!!!!!! hope it helps
It's a GM and you need to open the hood? Why??:confused:
J/K!
Go plow has it nailed. Good luck getting it open. Just don't let a Ford owner see it with the hood up....
In a while, Chet.
It's a GM and you need to open the hood? Why??:confused:
J/K!
Go plow has it nailed. Good luck getting it open. Just don't let a Ford owner see it with the hood up....
In a while, Chet. Sometimes you have to open the hood on a GM, usually it's to jumpstart a Ford or a Dodge!
engine block heater..

im new to diesels..whats the deal with the block heater??
i live at 4000' elevation, and it gets to at least zero in the winter..
i know what its for, just not sure when to use it..also ive noticed that maybe the truck ive ordered ( 06 duramax) will come with a grill cover..whats up with that?
im new to diesels..whats the deal with the block heater??
i live at 4000' elevation, and it gets to at least zero in the winter..
i know what its for, just not sure when to use it..also ive noticed that maybe the truck ive ordered ( 06 duramax) will come with a grill cover..whats up with that? I have a 01 Dodge Cummins I plug it in pretty much once it gets below 15 degrees at nite, it helps it start alot easier, & it gets heat faster when it's warming up. I think it also help the life of the motor being started warm
Same here on the block heater. I have mine on a timer so it comes on and runs 3-4 hours before I go to work. I figured out that was plenty after wasting electricity running it all night long. Stinks parking at work for 9-10 hours and coming out to a cold start with no heat for a long time :< Not a big fan of the grill cover, don't really understand why people think they need it. I know it helps you have better heat if you've got a small motor, and in big trucks that are wide open under the hood it can help protect the fuel filters from freezing up, but on a new pickup you ought to be able to heat that antifreeze up with that big motor, your air intake is not through the grill, and your fuel filter has a heater in it. I'd be more concerned about doing harm when it warms up and you still havent got it off yet. Maybe I'd do it if it was 20 below driving on the highway, but if you are plowing your making a lot of heat with little airflow anyway. I'm sure a lot of people swear by them, I'm just saying I've never needed one on my diesel. We had them for all our diesel heavy duty trucks at work a few years ago, wasnt long before we quit using them, too much hassle putting them on and taking them off every other day. Every once in a while I see one (usually an old buck driving), I have to wonder if he thinks all the other hundreds of diesel trucks on the road with him are suffering.
In most cases you can leave the truck plugged in for as long as you like, but you'll have to pay for the electricity. In below freezing temps its impossible for a block heater to get the antifreeze too hot.
When I was growing up, my parents installed a remotely switched electrical outlet in the garage so we could get up and switch on the block heater from the kitchen. That wasn't enough warm-up time in really cold weather, but still worked well to give you immediate heat in the vehicle. On really cold nights we just left the outlet (and block heater) on all night. There are a lot of electrical timers available now, so you could try the same setup and just have the outlet go on and off with a timer.
Bruce
dosnt need to be plugged in but it helps with everything for it to be a bit warm. Plus instant heat rocks:D And if you turn your truck to defrost and then turn it off when you plug it in alot of times light frost wont stick to 1/2 your window:cool: Its overkill but if its freezing I plug it in if I can. Only thing it hurts is electric bill but an outside timer set to kick on anywere between 1-3 hours depending the temp will acomplish pretty much the same thing and not eat up so much juice. The cord is bundled up on the pass side, you need to free it from the loom and then peel back some of the tape to get slack. Then I run it to the hole in the bumper and zip tie it in place. Tucked away when not in use but easy to get to.
Ok winter cover......again not needed. Buuuut......a warm diesel is a happy diesel. The stocker you cant run it while plowing though becasue the wind does some funky turbulence stuff and rips it off :eek: But I ran one of those cool man stainless steel ones and its a 2 peice deal and I left the bottom portion off the grill so air 1/2 way got to the trans cooler and such and everything ran fine in the way of operating temps. I never ran the bumper cover though.....
When you get your truck fit the factory vinal cover while its warm(either in a warm garage or leave it inside to get nice an pliable)



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