Last post on Jul 16, 2013 at 4:58 PM
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#2323 of 3676 PLEASE HELP 2003 Chevy Blazer 4x4 Bubbling Garguling noise.
Jun 03, 2006 (11:12 pm)
I started to hear this bubbling garguling noise that comes ang goes sometime a few months ago, my truck is still under warranty. I made the service manager aware of this and he stated that there probably was air in my cooling system an flushing it would slove the problem most likely. I had the dealer flush out my system an it still makes the noise, the crazy part is whenever i brought my truck up to them to hear the noise it didnt even make the noise for them to hear it. I noitced that when i look at my overflow tank when the truck is warm the fluid level is always more towards the ADD mark then FULL. An when its cold it seems like its at that same spot as well. So im wondering if i was to fill the overflow tank up to the FULL mark will it solve the problem? PLEASE HELP
#2324 of 3676 Re: 95 Blazer 4x4: brakes locking up [fungi]
Jun 04, 2006 (2:11 am)
I did some looking and moisture in the rears is reported to make this occur in the rears. Also saw a recall.safety issue 89-96 with braking issues (longer than normal stops) due to 4wd/2wd switch and the computer. So if this is not related to the rears I would call the deater and run your VIN, worth a try, but they will probably want to charge to inspect. Try the stop on a dirt road and have someone watch and see which really lock up if one close.
#2325 of 3676 Re: PLEASE HELP 2003 Chevy Blazer 4x4 Bubbling Garguling noise. [jkev229]
Jun 04, 2006 (2:22 am)
Yes, and this is classic heater core clogging noise and the quick fix is to flush (which is cheap and easy) but the real fix is core replacement and thats pullng the dash so over $500 to get to the heater box. Dex cool and 4.3L Blazers design with the GM cap have had more problems than most other GMs. That 5/150 coolant ad is BS and if you search you will see the many complaints. The correct way to fill is up to the hot line when cold - Dex cool does not like air so thats the best way to keep it out and from clogging the small core (like a mini radiator in there). Stant caps are the perferred one to use on these also. At some point this will blow a small hole and then you will have to pay - thats what they want to defer to. Get the problem noted in writing at the dealer and tell them you want the zone rep to look at this and a new core installed now. Document and insist but don't get mad, keep good records.
#2326 of 3676 Clicking on startup
Jun 04, 2006 (5:48 am)
Hi. I have a 99 Chevy Blazer. Every morning regardless of the tempertature outside, I hear a clicking noise on startup. It usually lasts approximate 1-2 minutes. There has been occassion where it has lasted longer than 2 minutes. I wait for the clicking to stop before actually driving the vehicle; however I've noticed that if I step on the gas while in park, the clicking will speed up. What coluld be the cause of this?
Thanks for your help
#2327 of 3676 Re: Clicking on startup [freddi19]
Jun 04, 2006 (8:47 am)
Probably a lifter sticking or pumping up. Check the coolant reservior and see if it is slowly dropping. Often this is the classic leaking lower intake manifold first sign as the Dex cool leaks into the valley on the lifters - you will never see it in the oil due to evap in there. If you are close to 100k thats it. If you are luckly just try some lifter quiet treatment and start using the high mileage oil with a good filter - it really helps. Check for oil cooler line leaks too - lines to radiator on drivers side. 4wd has 2 sets and 2wd 1 set. Finally, if the intake has been done check that the throttle cable is not pushing on the PCV and that makes a clicking too - often the cable holddown to the intake (plastic clip) breaks. Hope that helps.
Jun 04, 2006 (11:15 am)
Hi everyone, I'm new to this forum, and I just bought a GMC Jimmy 2.8 V6 for $200, and it's a late '80s, not sure yet exactly what year. Anyways, all I know thats wrong with it mechanically is it has no oil pressure. Have any of you had this prob with yours? I was told its either the oil pump for the motor is bad, but it only has like 90,000 miles so i dont think thats the case. Can anyone help me?
#2329 of 3676 Re: Engine Noise [repairdog]
Jun 04, 2006 (7:19 pm)
All back together after replacing the timing chain, gears and cover and still making the noise. I checked into the timing chain tensioner and found out it was $175+. Out of money for now so opted to not upgrade at this point. Kind of dobut the new timing chain set would cause a rattle that the one with 100k miles on it would, so I don't think the tensioner would solve the riddle at this point anyway. I will just have to drive it as-is. I am thinking that it could either be a sticky valve or something on the piston assembly for cylinder #1. I did not see anything overly worn on the lifters so I doubt the intake manifold water seepage issue has taken out the cam or main bearings. Any suggestions?
#2330 of 3676 Poor gas mileage 99 Blazer
Jun 04, 2006 (7:30 pm)
I own a 99 Blazer(4WD, 4D) with 50K miles. Over the last 6 mo the gas mileage has gone downhill--from 15 to 18 mpg to about 10 mpg in all driving conditions. The engine check light came on temporarily, but then when I got to the shop to check it there was nothing saved.
What is the most common culprit in this situation? O2 sensors, ignition, etc. Otherwise it runs ok with adequate power, starting, etc.
Thanks a lot,
#2331 of 3676 Re: No Oil Pressure [g2them2thec]
Jun 05, 2006 (1:02 am)
Replace sending unit as #1 (don't run if no pressure at all), no pressure then pull distributor out (mark position of the cap and internal rotor pointing for reinstall - need a timing light too) and check the pump drive on the bottom of dist, see if pump turns (long screw driver down dist hole), and if all fails, probably the pump - assumes oil and clean filter and the whole motor is not a sludge mess. That baby is over 17 years old and at 90k (old odometers had no 100k digit so is it really 90k, 190k, 290k??)wasn't run very hard so the internals may have deposits and it was a car motor belive only 87-89 used them.
#2332 of 3676 Re: Poor gas mileage 99 Blazer [sandi7]
Jun 05, 2006 (1:12 am)
Look at the plug wires breaking down, plugs possibly, but if it runs good I would first check the air filter, then clean the MAF sensor that measures the air and feeds the computer on fuel - its in the air intake above the filter housing - they make MAF sensor spray or use brake or electronic cleaner - not carb due to residue-(do not scrub it will break). Its in the honeycomb, a little sensor embedded. After that is the temp running alittle less then straight up or 190-200 degrees - if much lower the thermostat can stick open (low or cold running) will run great but be in a cold start fuel mode that is rich and uses more gas.