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Chevrolet Colorado



  • Anybody have any problems with rear main seal leak on the L5 engine. I have an 2006, crew cab, L5 engine, total miles 2200. I have owned it two months and it has been to the dealer three times (18 days). The last time I brought it in to the dealer the cable for the transmission fell off. I have owned chevy's for over 25 years, but this is my last one.
  • Read the new message on the board on L-5 engine. It doesn't sound good.
  • temj12temj12 Posts: 451
    I have an 05 and tonight I noticed graininess in the windshield. I tried using the washer fluid to wash it off, thinking it was dirt. I then thought someone had sprayed something on it. I ran my hand over it and it is smooth to the touch. It looks like grains of sand in the windshield and is really noticeable. I have 5700 miles on it and this is the first time I have noticed it.
  • p100p100 Posts: 1,116
    If you have a rear main oil seal leak, the transmission has to come out for the seal replacement. It is an expensive repair. This should not happen on a new truck. I had a rear main oil seal leak on my 95 Nissan 4X4 V6 pickup, but after 10 years/90k miles. Actually it was not the seal itself that leaked , but a paper gasket behind the rear main oil seal frame. They did not use sealant on it at the factory and the oil pressure finally destroyed the gasket. This oil leak ruined my perfectly good clutch, so I had the seal, paper gasket, and the clutch replaced to the tune of $ 1,200. If the clutch was not ruined, the seal or paper gasket replacement alone would have been about $ 850 because transmission and transfer case have to come out.
  • ocmike3ocmike3 Posts: 232
    A rear main seal leak is serious and with your low miles, looks like your truck wasn't assembled correctly. My 2004 Crew 4WD has been solid (almost 28k miles in just over 2 years.)
    If you bought it new or as a demo from the dealer, I'd start pushing the dealer to replace it. If you bought it used, I'd start talking to the dealer and the regional manager about working out a decent compromise to replace it...
    The Colorado is really an Isuzu. Not counting my Canyon, I've owned 3 Chevy/GMC trucks plus 2 El Camino's and all were very reliable...
  • I own a 05 colorado Z85 reg. cab I-5 auto trans with 17k and if im running my stock wheels around town I get 23+ mpg running 87 octane and if im running my 20x8 wheels I get 21 mpg as long as im not getting heavy on the pedal and doing the speed limits. I haven't been on a road trip with it so I cant give ny 2cents on that one.
  • poncho167poncho167 Posts: 1,178
    That is interesting in that glass is made out of sand, but you shouldn't see it.
  • temj12temj12 Posts: 451
    Thanks for your reply. As you say, glass is made out of sand. Honestly, you can the grains all over the front windshield. This has to go down as the wierdest problem I have ever had with a vehicle. I know the dealer will think: this guy is off his rocker. That is until he gets in and looks at it.
  • p100p100 Posts: 1,116
    Glass is about 90% sand, which is the source of silica oxide in glass. Other ingredients are feldspar, soda ash, and small quantities of other minerals that will end up as oxides in molten glass. Sand melts at temperatures over 2000 degrees F and some time is required for the molten glass to sit in a tank to refine. Different temperature zones in a glass metler will ensure that complete mixing and melting will take place by creating convection currents. Perhaps the glass they made your windshield from did not fully go through this process. No matter what the cause, there should be no visible grains of sand embedded in glass.

    Another interesting topic would be glass annealing, which, when done improperly, can cause a pane of glass to suddenly shatter before your eyes: this is due to trapped internal stresses as the glass cools. This is the cause of some sunroof pannel shattering without warning in some new cars.
  • jlb2jlb2 Posts: 18
    They do block to much of the rear view,i cut them out through the back of the seat and now alls well. JB. :)
  • jlb2jlb2 Posts: 18
    My 05 Colorado Crew, Z71 I-5cyl,auto ,340rear,2wheel dr[with locker],is a year old now .With 6700 miles gets 19to20mpg around town,20to21mpg freeway 65 to70mph,alcohol mix gas.I[always] oil change with Pins 5-30 at 3700miles.Replaced the 265/75/15 Generals with Yokahama 265/70/15[reads 3miles slower],replaced a door speaker.The engine,trans all else run fine,the body size is between the other midsizes and halftons.Always had 8 and 6cyl but figure with the new eng tec plus the times are a changeing,the 5cyl is very smooth.And i hope it might help save another good american job. Good Luck. :) JB.
  • hdbobhdbob Posts: 2
  • dmathews3dmathews3 Posts: 1,739
    you'll have better luck if you turn off your CAPITAL letters and that is concidered shouting and also harder to read. :shades:
  • This truck was purchased new from the dealer. I have contacted chevy customer service four times and they WILL NOT replace the truck or offer anything--What a waste of time. :lemon: The dealer is trying to work something out with me.
    On the rear main seal leak. They put in three seals and looked at two or three other ones and refused to use them because they looked bad. Chevy finally sent them a redesigned 2007 seal installed in its own housing. The dealer spoke to the enginneering designer of the engine and he said he has seen this problem before, but when I contacted "customer service" :sick: they said there is no problem with this engine.
    They tested the truck running it on the stand for two hours and a fourty mile rode test. So Chevy gets to test there problems on my truck with no compensation to me.
    Chevy is losing market share and having a problem attracting new customers but they also are having a problem holding onto the customer that they have.
    An update on this truck. It also has been to the dealer for two wheel alignments and a rear window replacement.
    What can I say but this truck is a :lemon:
  • atlvibeatlvibe Posts: 109
    Maybe it's time to seek legal action. Check and see how your states Lemon Laws apply. Then contact the BBB and open a case. Then contact an attorney that works in this field. The manufactor will buy it back if you jump thru enough hoops. Show them that you mean business.
  • pjjbmpjjbm Posts: 12
    Did the new head fix the problem? I was wondering why they did the head instead of the updated value springs and seals. Did they tell you anything or was it more of the TOP SECRET game? I am concerned, because I only got the updated value springs and seals (#719). Do I have more issues that I do not know about? Currently, my 2005 Colorado 2.8 has 20,000 miles on it.

    I think I finally found the cause of my intermittent engine shut-down. On a hunch, I changed the fuel filter. You would NOT believe the dirt that ran out of the filter. It looked like lint and plastic grindings. It appears the gas tank was dirty when the truck was built! It is now going on 1,000 miles since the new fuel filter and I have not yet had any engine shut-downs. Amazing...
  • pjjbmpjjbm Posts: 12
    I am not aware that GM ever admitted to the valve spring problem on the 4 cylinder. I obtained an internal number PIP3039H that talks about the same issue. I was able to get GM to replace the valve springs on my 2005 2.8 cylinder after much nagging. The new exhaust springs and seals got rid of the strong gas smell in the engine oil.
  • pjjbmpjjbm Posts: 12
    I had a A/C wistle/hiss noise issue with my 2005 Colorado and got GM to apply Bulletin 04-01-38-012A. That cleared up the A/C noise.
  • whizowhizo Posts: 1
    ;) I was wondering if anyone had a diagram for a 2005 colorado Mass Airflow Sensor (cold air intake area) I am attempting to install a power chip and need to know what color the V+ is. Thanks -
  • pmurraypmurray Posts: 10
    As far as I can tell it is fine. I am glad they replaced my head instead of just the springs and seals like they did on yours. It is still TOP SECRET with GM, I guess they are trying to keep any problems quiet but in my case it is the opposite. I had never been on one of the message boards until I was trying to find out about my problem, if someone had just given me a straight answer I probably would have never posted anything. Now that I look at the board it does sound like there may be some problems, but not too bad. I still do like my truck and don't see any other good options if you care about gas mileage. I love Toyota and had them for 25 years but the new ones are big gas hogs.
This discussion has been closed.