SORRY if I didn't post this to the correct forum/thread. . . . I am a newby at this
Briefly: My Vehicles,
2003 Trailblazer LTZ 2wd
-- -- -- 2002 Trailblazer LT 4wd (NEWEST Addition) -- -- -- THIS one has the issue
1999 Chevy K1500 4wd Ext. Cab
1999 GMC Yukon SLT 4wd
Cooling Issue: (Kinda long description, but want to give you EVERYTHING that has lead up to my conundrum)
Local Shops want:
$140 to Check PCM to see if settings that are sent to Fan Clutch are within parameters AND
$175 to download and update 02 Trailblazer PCM with latest HVAC Update for Fan Clutch from GM.
UMM. . . . NO, not at this point!
[1 of 3];
(1 Issue: This vehicle DRIVEN "MOSTLY" with AC "ON"!
I just bought a 02 Trailblazer LT 4wd, drove it for a week and a half, temp gauge "normal" around 208 "TOPS" degrees w/ AC On (DRIVING or at IDLE - Temp) NEVER went over 208 degrees [Outside temps around 98-103 degrees ARIZONA) - (Dash gauge and Torque Pro scantool=same reading).
(2 NOW:
Other than JUST buying this, I had to replace the alternator (Alt. off #1), battery, and the Quick disconnect (at the
heater core, SMALLER side if I remember correctly-left side of Heater Core standing in front) as it was leaking, so I replaced that, burped the system and,
everything as normal.
After around 2-3 days, i noticed that the temp gauge was heading "Stage Right" after driving for around 40 minutes(local roads), got up to 214-218 degrees. Shut AC off, and the temp started heading back down to almost CENTER mark.
Driving on freeway (AFTER driving for around 30-40 minutes) had SAME EFFECT, ran around 214-218 until AC shut off, then started cooling back down to around 210/208
In Short: (right after the 214-218 degree trip)
I replaced (just in case) Fuse #20 and RELAYS #39 & #40 (for future swapping if needed)
I changed Temp Sensor(Alt. off #2), Radiator Cap - SAME outcome.
I drove it for a week, NO Change
I THEN replaced the Thermostat (Alt. off #3 now), FLUSHED all of the Dexcool out and refilled with Prestone 50/50 and filled overflow tank with Prestone concentrate, burped system w/ heater turned on (blower fan OFF). Drove around - SAME outcome.
3 days LATER, I put large funnel in radiator, ran engine at around 2200 rpm WITH heater ON (blower OFF) for around 20 -25 minutes to create an ADDITIONAL "BURP" of system. . . a bunch of small bubbles came up, but nothing substantial.
2 days later, Drove to work & back. . . SAME outcome. Engine heated up to 214-218 degrees.
I added 2 - 9" electric fans to the A/C condenser and even that didn't seem to help cooling (driving OR at idle).
I then used my Combustion Leak Tester, after around 20-30 minutes with engine running, and came up Negative (all dark blue)
(3 FINAL:
Driving in 100 degree heat;
Driving (street driving) NO A/C - engine heats up to around 208-210 (Torque Pro & Gauge)! PERFECT
Driving (street driving) A/C ON - engine heats up to 214-218 (AFTER around 30-45 minutes of driving);
Driving (street/highway driving MIX) with A/C ON - engine heats up to 214-218 (AFTER around 30-45 minutes of driving)
After stopped at an Idle with A/C ON or OFF = for 15-20 minutes - cools back down to 210/208
Clutch fan FEELS to be pulling a decent amount of air through the radiator, OBVIOUSLY it doesn't sound like a jet taking off, so it hasn't LOCKED up.
Do these Over-engineered clutch fans LOSE their grip AFTER a certain temp?
NO feathers/plastic bags/lose debris/cats or dogs blocking air flow to EITHER condenser OR radiator.
ANY SUGGESTIONS? I have browsed through a TON of these forums and people have "SIMILAR" issues, but none of them answers the issue that I have. Thanks in advance for ANY assistance or advice.
Briefly: My Vehicles,
2003 Trailblazer LTZ 2wd
-- -- -- 2002 Trailblazer LT 4wd (NEWEST Addition) -- -- -- THIS one has the issue
1999 Chevy K1500 4wd Ext. Cab
1999 GMC Yukon SLT 4wd
Cooling Issue: (Kinda long description, but want to give you EVERYTHING that has lead up to my conundrum)
Local Shops want:
$140 to Check PCM to see if settings that are sent to Fan Clutch are within parameters AND
$175 to download and update 02 Trailblazer PCM with latest HVAC Update for Fan Clutch from GM.
UMM. . . . NO, not at this point!
[1 of 3];
(1 Issue: This vehicle DRIVEN "MOSTLY" with AC "ON"!
I just bought a 02 Trailblazer LT 4wd, drove it for a week and a half, temp gauge "normal" around 208 "TOPS" degrees w/ AC On (DRIVING or at IDLE - Temp) NEVER went over 208 degrees [Outside temps around 98-103 degrees ARIZONA) - (Dash gauge and Torque Pro scantool=same reading).
(2 NOW:
Other than JUST buying this, I had to replace the alternator (Alt. off #1), battery, and the Quick disconnect (at the
heater core, SMALLER side if I remember correctly-left side of Heater Core standing in front) as it was leaking, so I replaced that, burped the system and,
everything as normal.
After around 2-3 days, i noticed that the temp gauge was heading "Stage Right" after driving for around 40 minutes(local roads), got up to 214-218 degrees. Shut AC off, and the temp started heading back down to almost CENTER mark.
Driving on freeway (AFTER driving for around 30-40 minutes) had SAME EFFECT, ran around 214-218 until AC shut off, then started cooling back down to around 210/208
In Short: (right after the 214-218 degree trip)
I replaced (just in case) Fuse #20 and RELAYS #39 & #40 (for future swapping if needed)
I changed Temp Sensor(Alt. off #2), Radiator Cap - SAME outcome.
I drove it for a week, NO Change
I THEN replaced the Thermostat (Alt. off #3 now), FLUSHED all of the Dexcool out and refilled with Prestone 50/50 and filled overflow tank with Prestone concentrate, burped system w/ heater turned on (blower fan OFF). Drove around - SAME outcome.
3 days LATER, I put large funnel in radiator, ran engine at around 2200 rpm WITH heater ON (blower OFF) for around 20 -25 minutes to create an ADDITIONAL "BURP" of system. . . a bunch of small bubbles came up, but nothing substantial.
2 days later, Drove to work & back. . . SAME outcome. Engine heated up to 214-218 degrees.
I added 2 - 9" electric fans to the A/C condenser and even that didn't seem to help cooling (driving OR at idle).
I then used my Combustion Leak Tester, after around 20-30 minutes with engine running, and came up Negative (all dark blue)
(3 FINAL:
Driving in 100 degree heat;
Driving (street driving) NO A/C - engine heats up to around 208-210 (Torque Pro & Gauge)! PERFECT
Driving (street driving) A/C ON - engine heats up to 214-218 (AFTER around 30-45 minutes of driving);
Driving (street/highway driving MIX) with A/C ON - engine heats up to 214-218 (AFTER around 30-45 minutes of driving)
After stopped at an Idle with A/C ON or OFF = for 15-20 minutes - cools back down to 210/208
Clutch fan FEELS to be pulling a decent amount of air through the radiator, OBVIOUSLY it doesn't sound like a jet taking off, so it hasn't LOCKED up.
Do these Over-engineered clutch fans LOSE their grip AFTER a certain temp?
NO feathers/plastic bags/lose debris/cats or dogs blocking air flow to EITHER condenser OR radiator.
ANY SUGGESTIONS? I have browsed through a TON of these forums and people have "SIMILAR" issues, but none of them answers the issue that I have. Thanks in advance for ANY assistance or advice.