i have two issues when it park it makes a bubbling like noise and a squeeking noise now when im driving its kind of rought and makes a race car noise like im trying to go fast but cant really pick up,


Asked by Aug 24, 2013 at 10:09 AM about the 2002 Chevrolet TrailBlazer LS 4WD

Question type: Maintenance & Repair

8 Answers

check your coolant for the presence of motor oil...check the motor oil for the presence of coolant...thinkin' the worst case scenario....has the engine overheated?...look at the underside of the hood for a prior overheat...as this sounds kinda cooked...bet the coolant is low...bet the thermostat will not move easily....bet the waterpump is on the ragged edge and dripping out the weep hole...you should examine the engine's systems...the component belt has a tensioner....when the idler wears out will cause the flat belt to shimmy to one side and the idler will start grinding~

2 out of 2 people think this is helpful.

no over heating that i know of it has coolant i dont know anything of cars. so maybe it can be the thermostant that causes these issues? or the belt cuz my main issue now is when im driving its kind of rough and sounds like a race car going faST do you know what i mean??

1 out of 1 people think this is helpful.

Pablo Sandoval....the 'panda'...no relation. Take it to a mechanic you trust...Can price out a tensioner and belt....not CEL trouble codes...at all...no christmas style flashing red light? we should connect a diagnostic scanner to see if we need a new O2 sensor, if the air/fuel ratios are correct...combustion is normal~


1 out of 1 people think this is helpful.

serpentine belt~

1 out of 1 people think this is helpful.

the defective t-stat might be the source of your boilin'~


Where is the bubbling coming from. Get it hot again and check under the SUV, the transmission might be NFG. Listen don't touch the pan. Racing around!! Sounds like your tranny could be slipping and the fluid boiling. That is not good, if it is the tranny you will start losing gears soon if not already. You should have the 4.3L motor which comes with the 4L60e. These have issues and I happen to have the older version of that tranny (700r4) doin the same thing but I have lost every gear but 1st. Takes about 5 miles and the fluid boils. If it is the tranny replace/rebuild soon before it gets worse.

2 out of 2 people think this is helpful.

From your description, I'd say either a Fan clutch, Waterpump or a Belt/Tensioner problem! Is the bubbling noise coming from the coolant reservoir or elsewhere? Does it seem like the racing noise is coming from the fan shroud or lower and farther back in the engine compartment? Also, do these sounds appear when the vehicle is standing at an idle, or only when it is actually moving? These things will all help to narrow down your problem!!! Or you could take it to a trusted mechanic!

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions


Looking for a Used TrailBlazer in your area?

CarGurus has 6,168 nationwide TrailBlazer listings starting at $1,600.


Search Chevrolet TrailBlazer Questions

Chevrolet TrailBlazer Experts

#1 Tom Demyan
Tom Demyan
Reputation 650
#2 dandyoun
Reputation 540
#3 tennisshoes
Reputation 500
View All

Related Models For Sale

Used Chevrolet Tahoe"
1,074 Great Deals out of 36,043 listings starting at $1,700
Used Jeep Grand Cherokee"
1,210 Great Deals out of 73,881 listings starting at $1,593
Used GMC Envoy"
98 Great Deals out of 2,602 listings starting at $2,500
Used Ford Explorer"
1,361 Great Deals out of 71,754 listings starting at $300
Used Chevrolet TrailBlazer EXT"
19 Great Deals out of 1,523 listings starting at $2,500
Used Chevrolet Silverado 1500"
2,440 Great Deals out of 144,713 listings starting at $1,995
Used Chevrolet Blazer"
1,649 listings starting at $1,999
Used Chevrolet Impala"
935 Great Deals out of 35,693 listings starting at $1,500
Used Chevrolet Camaro"
799 Great Deals out of 38,820 listings starting at $2,650
Used Dodge Durango"
404 Great Deals out of 22,641 listings starting at $1,400
Used Ford F-150"
3,257 Great Deals out of 216,652 listings starting at $1,500
Used Ford Escape"
1,710 Great Deals out of 93,978 listings starting at $788

Used Cars For Sale

2007 Chevrolet TrailBlazer LS 4WD For Sale
10 Great Deals out of 249 listings starting at $2,913
2006 Chevrolet TrailBlazer LS 4WD For Sale
7 Great Deals out of 414 listings starting at $1,795