Jump to content

07 Gmc Sierra 1500 Leaking Something


Recommended Posts

Posted

12,000 miles on truck, first time I have changed the oil. Bought the truck used, I am sure the dealership has changed it before.

 

Went to change the oil this past weekend, jacked up the truck, grabbed the creeper, a few tools and was all set to go. Ready to pull the plug when I see this. Sorry for being so close, but I only had a few inches to work with. Whatever this stuff is, it has to consistency of molasas, very thick and sticky. It looks like it is coming from the tranny housing.

 

DSC04472.jpg

 

DSC04473.jpg

 

DSC04467.jpg

 

DSC04470.jpg

Posted

Look up by the starter, on the opposite side from the oil filter, if there is oil on or near the starter bolts, then it's the Crank position sensor o-ring, it is located above that area. Mine was leaking from the CPS o-ring and the rear main seal. The dealer may try say it's the oil cooler line manifold block, and it may be, in this case, look there, it is located near the oil filter (see pics in my old thread, post #19 in thread linked above).

Posted
My first though is the rear main seal. Is oil or the substance hetting the ground?

 

Nope nothing hitting the ground

 

VMAX2007 - I knew I saw this issue somewhere, just could not remember where, hell I even posted in that thread. I will take it to the dealer with the info from here and have them look it over.

Posted
My first though is the rear main seal. Is oil or the substance hetting the ground?

 

Nope nothing hitting the ground

 

VMAX2007 - I knew I saw this issue somewhere, just could not remember where, hell I even posted in that thread. I will take it to the dealer with the info from here and have them look it over.

 

 

What dealer did you buy from? I bought mine from White Bear Lake Superstore on hwy 61.

Posted
[

What dealer did you buy from? I bought mine from White Bear Lake Superstore on hwy 61.

 

Miller Auto Plaza/Chevrolet in St. Cloud. Will be taking it to Miller Chevrolet in Rogers for them to check it out. Called about 30 minutes ago, they can look at it in the morning.

 

Trying to find the TSB for this, anybody have a link?

 

Thanks

Posted

I work at a GM dealer as a Tech.

 

Last week, a customer came in with his 2008 Sierra Reg Cab, with ONLY 1,100 miles on it. He was petrified because he saw oil leaks on his driveway. And he just bought this truck a few weeks ago, brand-new. 5.3 v-8

 

Guess what?? Rear main issue, and the bottom of the truck soaked with oil

 

I was just disgusted when I saw this. Come on...08's with only 1000 miles...and leaking like this????

Posted
I have 17K miles on my truck and it has the same exact problem. Everytime I change the oil I wipe it off. Mine doesn't seem to be that much maybe like a drop of Molasses.

 

 

Why not get it fixed? It's only going to get worse ya know. That's what a warranty is for.

Posted

Dropped it off this morning, told them about the oil leak and the little surge when sitting at the stop light.

 

Conclusion

 

Replaced oil pan gasket -

 

Who wants to bet I will be making another trip to the dealer in a couple of weeks

 

They could not do anything about the surge when stopped.

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Forum Statistics

    250.3k
    Total Topics
    2.7m
    Total Posts
  • Member Statistics

    342,726
    Total Members
    8,960
    Most Online
    Ragg-Boy
    Newest Member
    Ragg-Boy
    Joined
  • Who's Online   6 Members, 0 Anonymous, 965 Guests (See full list)

  • Latest Articles

  • Posts

    • I had skimmed through that article when you posted the link and honestly I felt rather defeated in a sense and realized that all these years in changing oil that in fact putting in what I was told was a good quality oil was probably not filtered as well as it should be although the filter put on the engine would be what ( as long as it never went into bypass mode ) would be the final filtering of the new oil that the engine components would first see, but then the filtering media itself is not up to par to what is ideal because a full flow filter would be too restrictive to filter fine enough for the engines best outcome in the long run. Only one of our tractors over the years which was a Versatile with a 855 Cummins had a separate bypass filter, some engine manufacturers did spec a partial bypass system within the main oil filter but I don't believe any other trucks or equipment I was servicing used such a filter. No doubt a product like the Amsoil bypass system is of benefit as long as nothing goes sideways with the extra plumbing and filter such as a rupture/leak that could cause the oil to pump out of the engine ( yes that Versatile had a remote canister with hoses routed to it as well ). With the idiot egr system on a diesel and as a result forcing a lot more soot into the oil, that certainly isn't helping the diesel engines cause or as you pointed out the GDI engine issue with creating more soot and aside from having a fancy secondary filtering system, changing the oil more often helping lower the total soot load.     So oil manufacturing and the end product is not something one can control and I wonder if there are specs on what various oil packaging companies produce in particle count or size. As to the filtering, if the OEM is not designing a filter size and spec that is really what it could be, they too are short changing the end user and so what is the answer. Of course as you say the oil side can only do so much if the air side isn't keeping up its end of the picture and air filters are only so efficient and if in a dusty environment such as farm or construction or driving gravel roads there is a lot of dirt to filter out and some of that ends up into the air stream.    Of course the irony in places like where I am where they dump the salt on the highways but also will mix in some calcium or outright pure calcium for problem road area's, or using calcium as dust control on gravel roads, the vehicle that gets used in that environment may rust out before a properly engineered engine and maintenance finally wears out so one has to face that reality in the rust belt. 
    • Has anyone run these on their 2500?
    • have you stuck with dealer oil changes since then? I made the same switch after getting tired of crawling around under the truck, but I’ve found some dealers are way better than others about getting you in quickly. Curious if yours has been good about scheduling or if you’ve had to look elsewhere for quicker turnaround.
    • Thank you.   I am set on a 3.0 Duramax as my previous truck with a Ford Ecoboost had just as many, if not more, "common" issues.  Cam phasers, timing chain issues, 10-speed valve body and CDF drum, emissions issues, etc.  So I figured, why not get 2x the fuel mileage (these things got 27+mpg on every mixed city/highway test drive I put them through) and better towing capability with resale value to boot?   My minimum, shortest trip will be 50 miles 1-way and I regularly go out of state with a travel trailer.  I'm planning on using this for a marketing/event promotion business also, which would require regular towing of trailers for bands, DJs, sound and lighting gear, along with my personal camera gear for filming events.   Looked at other trucks in the $30k+ price range but the issues seem to be everywhere, plus too many with gaudy mods.  I'm literally sticking with RWD trucks because they tend to be actually used as trucks, vs. the 4x4 models I've seen with unsafe lifts, huge tires, and general mods that would affect reliability (I'm wondering if some of them were tuned, hence the aggressive throttle response and hard shifting).   So my goal is to find a stock, 3.0 with 1 or 2 owners, in good physical condition, and decently well maintained.  Can't seem to find that up here, everything in the $27-30k range has had multiple owners, smoke smell, issues, or body damage.  Or the ridiculously modified trucks with 80k miles for under $27k but lots of problems...
    • That’s pretty tough Grumpy. I reread the previous few posts. They all reference oil changes. Much like your last thread. In my humble opinion it keeps things interesting.
  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...