Jump to content

Time for head gaskets....

20L8TSierra24

By 20L8TSierra24
in Troubleshooting & Recalls

Recommended Posts

20L8TSierra24 Senior Enthusiast

20L8TSierra24

Posted
Posted

55k miles on my 16 LML with excessive coolant pressure. I had a local diesel shop confirm my suspicions before I take it in this afternoon.  Bummer for sure...  At least it's still under warranty!

DmaxHugh Enthusiast

DmaxHugh

Posted
Posted
2 hours ago, 20Bowtie14 said:

55k miles on my 16 LML with excessive coolant pressure. I had a local diesel shop confirm my suspicions before I take it in this afternoon.  Bummer for sure...  At least it's still under warranty!

Wow!! I bought my L5P in March or April of this year and my warranty is up in another 10k miles. 3 year 36k miles is all they give now. I hope that’s not a sign that they don’t expect them to last long.  

20L8TSierra24 Senior Enthusiast

20L8TSierra24

Posted
  • Author
Posted
38 minutes ago, DmaxHugh said:

Wow!! I bought my L5P in March or April of this year and my warranty is up in another 10k miles. 3 year 36k miles is all they give now. I hope that’s not a sign that they don’t expect them to last long.  

Definitely stinks big time. Makes me question the reliability of these trucks... 

 

In 55k miles I've had a water pump, power steering pump, electrical issues, power folding mirror motors, water leak(s) in the cab, and now head gaskets......

jhplak325 Enthusiast

jhplak325

Posted
Posted
1 hour ago, DmaxHugh said:

Wow!! I bought my L5P in March or April of this year and my warranty is up in another 10k miles. 3 year 36k miles is all they give now. I hope that’s not a sign that they don’t expect them to last long.  

bumper to bumper warranty is 3 years/36,000 miles. Powertrain is 5 years/100,000 miles for diesel and 5 years/60,000 miles for gas.

 

 

DmaxHugh Enthusiast

DmaxHugh

Posted
Posted
19 minutes ago, jhplak325 said:

bumper to bumper warranty is 3 years/36,000 miles. Powertrain is 5 years/100,000 miles for diesel and 5 years/60,000 miles for gas.

 

 

Oh, well I guess I’m not paying enough attention when signing my paperwork. Thanks for the info! That makes me feel a little better. 

  • 2 weeks later...
20L8TSierra24 Senior Enthusiast

20L8TSierra24

Posted
  • Author
Posted

I have an appointment for November 11th to take it in. The dealership said they haven't been able to do anything because of the strike. They're replacing an engine and another head gasket job that are in line in front of me.

redwngr Senior Enthusiast

redwngr

Posted
Posted
On 10/18/2019 at 3:07 PM, DmaxHugh said:

Wow!! I bought my L5P in March or April of this year and my warranty is up in another 10k miles. 3 year 36k miles is all they give now. I hope that’s not a sign that they don’t expect them to last long.  

I think you'll find that the L5P has a 5 yr/100,000 miles powertrain warranty.

 

Yes, the comprehensive warranty is 3/36k.

 

 

https://www.gmc.com/owners/warranty-details

 

From above link, the Powertrain Coverage section says:

 

COVERED FOR 5 YEARS/60,000 MILES†
POWERTRAIN COVERAGE

All 2018-2019 GMC vehicles come with a fully transferable, no-deductible, 5-year/60,000-mile (whichever comes first) Powertrain Limited Warranty. The 2500 and 3500 Series Heavy Duty (HD) pickups equipped with a 6.6L Duramax® Turbo Diesel Engine are covered for 5-years/100,000 miles, whichever comes first. See dealer for details.
The Powertrain Warranty covers repairs due to defects in materials and/or workmanship for components listed below:

 

ENGINE
All internally lubricated parts, engine oil, cooling hoses and lines. Also included are all actuators and electrical components internal to the engine, cylinder head, block, timing gears, timing chain, timing cover, oil pump/oil pump housing, OHC carriers, valve covers, oil pan, seals, gaskets, turbocharger, supercharger and all internal lubricated parts as well as manifolds, flywheel, water pump, harmonic balancer and engine mount. Timing belts are covered until the first scheduled maintenance interval. Exclusions: Excluded from the powertrain coverage are sensors, wiring, connectors, engine radiator, coolant hoses, coolant, and heater core. Coverage on the engine cooling system begins at the inlet to the water pump and ends with the thermostat housing and/or outlet that attaches to the return hose. Also excluded is the starter motor, entire pressurized fuel system (in-tank fuel pump, pressure lines, fuel rail(s), regulator, injectors, and return line) as well as the Engine/Powertrain Control Module and/or module programming.

 

TRANSMISSION/TRANSAXLE
All internally lubricated parts, case, torque converter, mounts, seals, and gaskets as well as any electrical components internal to the transmission/transaxle. Also covered are the actuators directly connected to the transmission (slave cylinder, etc.). Exclusions: Excluded from the powertrain coverage are transmission cooling lines, hoses, radiator, sensors, wiring, and electrical connectors. Also excluded are the clutch and pressure plate as well as any Transmission Control Module and/or Module programming.

 

TRANSFER CASE
All internally lubricated parts, case, mounts, seals, and gaskets as well as any electrical components internal to the transfer case. Also covered are any actuators directly connected to the transfer case as well as the encoder motor. Exclusions: Excluded from the powertrain coverage are transfer case cooling lines, hoses, radiator, sensors, wiring, and electrical connectors as well as the transfer case control module and/or module programming.

 

DRIVE SYSTEMS
All internally lubricated parts, final-drive housings, axle shafts and bearings, constant velocity joints, propeller shafts and universal joints. All mounts, supports, seals and gaskets as well as any electrical components internal to the drive axle. Also covered are any actuators directly connected to the drive axle (i.e., front differential actuator, etc.). Exclusions: Excluded from the powertrain coverage are all wheel bearings, drive wheel front and rear hub bearings, locking hubs, drive system cooling, lines, hoses, radiator, sensors, wiring and electrical connectors related to drive systems as well as any drive system control module and/or module programming.

 

TRANSPORTATION PROGRAM
During the warranty coverage period, GMC provides alternate transportation and/or reimbursement of certain transportation expenses under the Courtesy Transportation Program if your vehicle requires warranty repairs. Several transportation options are available. Refer to your Owner’s Manual or consult your GMC dealer for more details.

 

ROADSIDE ASSISTANCE
GMC is proud to offer the response, security, and convenience of the 24-hour Roadside Assistance Program for a period of 5 years/60,000 miles, whichever comes first. Refer to your Owner’s Manual for details, or consult your dealer/retailer. The Roadside Assistance contact information is listed in the Customer Assistance Offices section of the Warranty and Owner Assistance Information booklet.

 

WHAT IS NOT COVERED
All the above items are not covered for damage due to accident, misuse, alteration, insufficient or improper maintenance, contaminated or poor quality fuel, damage or corrosion due to chemical treatments or Aftermarket Products, impact, use or environment. For complete details, refer to your Warranty and Owner Assistance Information booklet. Other coverages are not extended or altered due to this supplement.

Archived

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

Go to topic listing

  • Latest Articles

  • Posts

    • Atlas
      New or used

      By Atlas · Posted

      I prefer new, but not without a deal. Historically I've bought severely aged new inventory, leftover model year, unpopular configuration kind of stuff that sits around on dealer lots until they just want it gone. $10k off MSRP kind of stuff on a mid-priced truck. That really, really helps knock down that first year depreciation. It also requires being somewhat flexible on colors and options. I wouldn't buy a 4 cylinder if I was looking for an 8 cylinder, but if I got blue paint instead of black, or a great deal was lacking a minor option, I'm willing to overlook those things for savings.   Used <> used. Condition and history are everything. If I'm buying used I'm looking for cream of the crop. The truck from the guy who religiously pampers it, and then decides a year later he wants newer and nicer. NOT the ex-rental vehicle, or the crew cab traded in by the family with 7 kids who like to throw food, and the oil only got changed when there was time long after the oil life monitor started alerting.
    • Atlas
      OCI, not when but why?

      By Atlas · Posted

      @Grumpy Bear the conclusion from your post about doubling engine life has me curious. Are we literally talking an expected life of 250,000 miles potentially becomes 500,000 miles with a step up in filtration for fresh oil at "the oil factory" when it's bottled? I know you said that's a single variable among many, but, that's significant if the implication extends that far into a real world use case. I would think the oil marketing folks would really eat that up and make it known.   Particles introduced during oil change is a fairly easy one to avoid, but probably not intuitive as one would think. I.e. using a clean funnel. But...what was it wiped with? Paper towel leaves behind little fibers. A solvent if not dried is not something one would want to introduce into their engine with clean oil. And, keeping the oil filler neck clean and free of buildup.. Look at some guys engine bays and they're an absolute mess. Some say that's better than the drawbacks of cleaning it. I'm not a buyer of that idea.   I've also wondered if "flooding" the top end of the engine with oil while filling is a bad idea. During normal lubrication the oil flows in a gutter back into the galleys. But if you flood the area you're potentially washing the top of the rockers, springs, and other areas which may not get much oil wash normally, and you're mixing all that into the new oil. I just don't have the patience to pour slowly. 😆    
    • Newduramaxh*ar
      DTC P2C48 auxiliary cooling pump

      By Newduramaxh*ar · Posted

      It was a bad pump, i had a dealer next day the pump. Gm part #86591535. Tools needed 10mm socket, pliers for hose clamps, 1/2gal of Dexcool. About 30mins to remove and install, pump located near oil filter on driver's side frame rail. I had a local mobile mechanic delete the code, he had a snap on scan tool. My scanner could not delete the code. I drove back home about 700 miles since then, and no check engine light. Hope this helps someone in the future in the same situation i was in. Thank you to all that helped me.
    • MORSNO
      Road Master Active Suspension

      By MORSNO · Posted

      Good to hear!  
    • Coastie05
      New or used

      By Coastie05 · Posted

      Hi Gary, I guess it all boils down to personal preference and what you can afford. I, personally, buy new because I will know from day one how the vehicle is maintained and driven. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...