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| 01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect |
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11-23-2008, 02:31 PM
| eBay Motors #1 (permalink) |
| Senior Member  Join Date: Nov 2008
Posts: 348
| Luke Warm Heat? Hey guys, I'm new to my truck ( 3 days) and I've noticed that it doesn't come up to temp all the way. I drove it home on Thursday from Wisconsin to Indiana, so at highway speeds for 5 hours it would only get to about 180 degrees. The heater blows out warm heat, just not HOT. Think a thermostat is stuck? Or something else? |
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11-23-2008, 04:25 PM
| eBay Motors #2 (permalink) |
| DuramaxForum Enthusiast  Join Date: Apr 2008 Location: Ocala, FL
Posts: 2,362
| Check the thermostat but other than that it could be the heater core going bad.
__________________ NAME: JIMMY 2002 CC/SB Duramax LS 4x4 LB7, Solid axle conversion, 14" lift, 20" XD Diesels (black), 39.5x16.5x20 Pitbull Rocker M/Ts, ATS E-power 160HP/360TQ Tune, Edge Attitude Moniter for Guages, Amsoil Custom Intake, PPE Boost Valve, Custom 5" Straight pipe w/7" Tip, Limo Tint everywhere, HID 8k heads, Smoked tails, NBS Tow Mirrors, Clarion 7" flip out, [I](2) 10" subs http://www.atptrucks.com |
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11-23-2008, 04:29 PM
| eBay Motors #3 (permalink) |
| Senior Member Join Date: Nov 2008
Posts: 348
| Ahh ok, well i'll give the thermostats a change, they are probably original and sticking open a little. |
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11-23-2008, 06:25 PM
| eBay Motors #4 (permalink) |
| DuramaxForum Veteran Join Date: Nov 2008 Location: tacoma wa
Posts: 2,426
| Check the heater hoses going into the firewall are they the same temp. Start the truck and drive it for about 2 minutes get out and feel those hoses if they are the same temp its not the heater core. I have never seen anyone of the 16 techs at my dealership change a heater core in a dmax. Its probobly a mode door actuator. Check to see if the passenger and driver side vents are the same temp.
__________________ 2005 LT 3500HD CCLB SRW LLY EFI LIVE TUNED BY IDAHOROB TCM TUNED BY MMLMM Lbz intake and mouthpiece Torsion lift keys MBRP 4" turbo back Autometer boost and egt, res mod, Ride rite bags Mcculloch 5300k HIDS Hauls a 13k toyhauler to the dunes My other car follow the link http://www.superchevy.com/features/c..._ss/index.html |
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11-23-2008, 06:35 PM
| eBay Motors #5 (permalink) |
| *The Solder King!* \m/ \m/   Join Date: Jun 2007 Location: Earth
Posts: 8,676
| Also just a heads up.....180F is normal for engine temps..... The hottest I ever had mine was 190...but I was on SL running in 90F weather...
__________________ RIDE: 2007 Chevy CCSB LBZ colormatched all around/bedlinered bottom LIFT: ZONE, Kryptonite Front end, Cognito Brace kit, Traction Bars, Comp. Tubes TRANS: Big Dipper Stage IV/PPE Deep Pan / Pump rub fix SOUND:X4500BT, 6 1/2 JL Audio's, 10"s, 5 Channel JL AMP INTERIOR: EGT/Boost Autometers & CTS, Black Cherry Denali Trim and wheel, Black Leather, Red L.E.D's, US Speedo Cluster, Rubber Floor, 20% tint ADD ONS: 40 overs, AD II 165, Oasis Diff, Roll pan, Merchant brace, BigChevyHitch, Cowl Hood, 4500K HIDs, AMP Research Steps, LM Grille, BedRug w/ Recon lights, ExTang Solid Fold, LED tails TIRES/WHEELS: 35X12.50-20 Toyo MT on 20x10 BMF S.O.T.A's and 4.56 Gears AIRFLOW: EPR Triples, Turndown, AFE intercooler pipe, EFI LIVE by ATP INSTALLER: BLACKOUT PERFORMANCE  |
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11-23-2008, 06:37 PM
| eBay Motors #6 (permalink) |
| Junior Member  Join Date: Jan 2008
Posts: 186
| So you're sayin that the engine doesnt heat up all they way? I would check the coolant level first then the thermostats. I dont see why the heater core would cause it not to warm up. Unless you guys are stating that is why it doesnt blow HOT air.
__________________ 04' CC, S&B CAI, 6" Miters, PPE boost valve, Quad commander, tie rod sleeves, PPE standard |
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11-23-2008, 06:46 PM
| eBay Motors #7 (permalink) | |
| Junior Member  Join Date: Nov 2007
Posts: 229
| Quote:
__________________ 02 ZF-6spd ccsb -4" straight pipe 5" tip-Turbo Mouthpiece mod-PPE boost valve-Autometer gauges-EDGE EVO CS RACE-plugged resonator-remote start w/ turbo timer-Remote start controlled high idle mod-Hi-lowbeam headlight mod-6K HID Headlights and Fogs-Blacked out tails-315/75/16 DiscovererATRs black factory alloys-2wd to 4wd converted with a divorced np205-South Bend ceramic clutch and solid mass flywheel | |
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11-24-2008, 04:48 AM
| eBay Motors #8 (permalink) | |
| Senior Member Join Date: Nov 2008
Posts: 348
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11-24-2008, 05:19 AM
| eBay Motors #9 (permalink) |
| Member Join Date: Jan 2008 Location: Sophia, WV
Posts: 42
| the digital guage on my edge display shows mine at 176-180 all the time, i was wondering if my thermostats were bad until i read these posts, i guess the thermostats in these trucks are 180 degree instead of 195's
__________________ 2005 CCSB Edge w/ attitude, hypertech programmer, no cat/muffler, 3" body lift, 315/75/16 Cooper Discoverer STT's, roadrage |
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11-24-2008, 05:23 AM
| eBay Motors #10 (permalink) |
| Insert cool slogan here    Join Date: Sep 2008 Location: North Pole AK
Posts: 3,889
 | There is blend door that controls the amount of fresh/cold air that mixes with the warm air that comes through the heater core. These are known to go bad or the linkage falls off. If you have a hand held inferred thermometer I would use it to check the temp of the heater hoses as well as the temp of the thremostat housing.
__________________ 2010 GMC Sierra CC SB 4X4 6" lift and 315's 2008 GMC Sierra Crew Cab 4X4 (wifes) stock now... Zone lift going on and 305's |
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