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    Chevy issues - What are your thoughts

    I have a couple of issues that came up with my truck this past week and I was wondering what you guys thought (besides burn it and get a new one).

    My truck is a 2004 Chevy 2500HD 4x4 6.0 gas with about 240,000 miles.

    This past week I towed my travel trailer back and forth to Colorado. The travel trailer is about 10K pounds. I have taken it up there about 7-8 times with this truck and never had issues, but it is getting old.

    I have three current issues with the truck.

    #1 Brakes: When I was driving for a while and then I applied the brakes there was a squeal under the hood that sounded like when you turn the steering wheel really far to the side or when you are low on steering fluid. The squeal had nothing to do with the steering. It was 100% brakes. It was pretty loud when I first hit the brakes after driving for a while without using the brakes. If I held on the brakes it kept squealing, but if I let off and tapped or pumped them it would get quieter with each tap then go away. I don't know if it only happened with the trailer behind the truck. It was on all terrain.


    #2 Coolant: I drove all the way to Colorado and spent 10 days there and about 150 miles from home I was passing some cars and I noticed my in dash computer said something about the coolant being hot. I looked at the gauge and it usually runs about 215-220 and it was about 240 or so. I was running 70mph with the gear in drive and I was at about 4000 rpm. I immediately dropped to about 60-65mph and the rpm dropped to 2500 rpm or so and the engine cooled down and never did it again. I never went that fast the rest of the way home. I had been driving across New Mexico at 70mph in 102°F and didn't have any problems. It was 98°F at the time.

    #3 Battery/alternator: About 45 minutes after #2 happened my battery light came on and the in dash computer said the battery was not charging. I immediately turned off the ac, radio, running lights, and anything plugged in the cig lighter. I drove the next 100 miles watching the battery gauge falling slowly. The gauge reads from 9-19. It usually sits at 12 and over the next 100 miles it fell to just over the 9. When I applied my brakes, I would see it fall. When I used my blinkers it would fall. I basically drove into my land and parked the truck. I then tried to roll up the windows and it died. My guess is the alternator is dead. If it were the battery and not the alternator I would think the voltage would remain constant without any other electrical components on. Just a guess. The trailer being towed had electrical brakes.

    I did not pull the codes yet. It is on the charger now.

    So besides burning it and buying a new one. What are your thoughts?

    #2
    sounds like the belt and tensioner/and idler pullies need to be replaces

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      #3
      I would say you've done pretty good with the truck so far to have that many miles and I would go ahead and stick a couple thousand in it versus a payment ever month for however many years. Alternator would be my guess on #3, #2 could be something as easy as needing coolant flushed or as bad as radiator going bad, #1 not real sure but rotors could need to be turned and/or new pads. I wouldn't be so quick to trade off a truck that's been good to you for 11 years and just needs a little maintenance.

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        #4
        On your braking/squealing issue I'm wondering if the master cylinder is going out on you? With you saying that the sound is coming from underneath the hood that would lead me to believe the master cylinder is acting up somehow. It's mounted right next to the firewall under the hood on the 6.0s if I remember correctly.

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          #5
          Sounds to me like you've got a Chevy gasser with a quarter million miles on it!

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            #6
            I second what burtonboy said.

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              #7
              bwssr is right. You have a hydroboost system for the brakes. It operates off of the powersteering pump. The alternator will not charge the system if the belt slips. The belt also powers the water pump.

              New belt, tensioner, and idler pulleys and you should be good to go.

              240k isn't that much.

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                #8
                It could be 3 separate issues, or you're computer could be shorting out. Either way, you're about to drop a good amount of money. My 2000 would completely shut off, electric, engine, everything. Did it twice while at night on i20 while doing 70. Got rid of it.

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                  #9
                  Originally posted by Brooks View Post
                  bwssr is right. You have a hydroboost system for the brakes. It operates off of the powersteering pump. The alternator will not charge the system if the belt slips. The belt also powers the water pump.

                  New belt, tensioner, and idler pulleys and you should be good to go.

                  240k isn't that much.
                  I am about to look up hydroboost system, but would a loose belt cause the brakes to sound like this? It did seem like it was just behind the firewall from the steering wheel?

                  I was going to take it up to orilley after work to have them check the alternator. I am guessing that if it were a loose belt then it would show bad even if it is good.


                  More info: All of the coolant parts (thermostat, pump, etc) are all factory. Also the alternator is factory. The belt is 1 1/2 years old.

                  Comment


                    #10
                    new belts don't seem to run as long as the original...but when you hit the breaks, the P/S pump gets worked harder, to work the hydro boost...this may have over taxed the belt...but I found you should always replace the 2 pullies with the belt...new tension on old pullies...let us know what you find

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                      #11
                      I have the exact same truck in a 2007 model. I know this isnt your question but I try to never run mine much over 3000-3200 rpms. I cant begin to imagine running my truck at 4000rpms. I think the rpm gauge only goes to 6000. Have you done that the entire life of the truck? Not being critical just curious. The voltage issue IMO you are on the right track

                      Comment


                        #12
                        Chevy issues - What are your thoughts

                        For issue number one, I'm not sure the heavy-duty gas trucks have it with the heavy-duty diesel trucks do you have a hydroboost system where your brakes work off of your power steering pump. Beyond that I can't help much further it may give you a starting point to do some research.

                        For issue number two I would just plan to go ahead and change out the radiator hoses thermostat and put a new water pump on it. I changed everything on my 2004 except the radiator and it runs hot while sitting in traffic or towing my trailer as well. I'm planning to change mine out to a larger aftermarket radiator with electric cooling fans.

                        Issue number three sounds like an alternator to me.

                        Comment


                          #13
                          Originally posted by fbchunter View Post
                          I have the exact same truck in a 2007 model. I know this isnt your question but I try to never run mine much over 3000-3200 rpms. I cant begin to imagine running my truck at 4000rpms. I think the rpm gauge only goes to 6000. Have you done that the entire life of the truck? Not being critical just curious. The voltage issue IMO you are on the right track
                          I have always run my truck fast and hard. The only time I had issues is when we ran it out of transmission fluid due to a line coming off.

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                            #14
                            Have you thought about taking to a dealership and having them run diagnostics on it? Cost would run ya around $100 but it could save you a lot of time and money on figuring out what's wrong. Then you can do the repairs yourself.

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                              #15
                              Don't let O'reilley's sell you a new alternator.... Their parts are junk imo. Every part I have bought from them (and Autozone) has died within 3 months.

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