Here we go -- Head Replacement in progress.

[Drew Slothower]

I forgot to post: The H3 has approx 21k miles on it, about 1.5 years old.

f5fstop -- the codes I saw on the display were:

Traction Failed
Service Stab Sys
Reduced Power
Check engine light on

then, I turned the car back on:

Fuel showed as empty
Engine light still on

I turned everything off, got out to check everything. I turned the car on a third time:

Only check engine light on.


After the H3 was towed to the dealer, they ran a test saying that the engine failed a pressure test, and the head needed to be replaced. It also sounded like there were some diagnostic codes that were identified as well that told more of the story of the problem.

They said the fuel issue was due to something called the 'Fuel sending system' (I don't have my notes, but they did not refer to it as the fuel pump)

[mln2963]

Since having the head replaced at the beginning of April my mpg has increased! Before I was getting 13.5 - 14 around town. Now I've got up to 14.8.

[Drew Slothower]

Well-

I just got the news from the dealer. The car's been in the shop since before memorial day (May 24th -> today).

They said they have everything back together, but the H3 would not start. I was told they needed to order a "computer" to be replaced. (Not much more detail than that)

Has anyone else had this issue? What could they be referring to with the "computer" on a 1.5 year old truck with 21k miles on it??

[RubHer Yellow Ducky]

Originally Posted by Drew Slothower

Well-

I just got the news from the dealer. The car's been in the shop since before memorial day (May 24th -> today).

They said they have everything back together, but the H3 would not start. I was told they needed to order a "computer" to be replaced. (Not much more detail than that)

Has anyone else had this issue? What could they be referring to with the "computer" on a 1.5 year old truck with 21k miles on it??

Your Sinclair has gone bad and needs to be relpaced... simple as that

[Drew Slothower]

After a 13 day run without the H3, everything was finally back together and working. Everything seems to be running A-OK, and the service manager showed me everything that was done.

He told me that he had done about 8 H3's at the dealership, and the mechanics have the head replacement down. Much of the delay was due either waiting on parts, or something else breaking.

Here's all that was done:

Head, Cylinder - Replace (This included gaskets, bolts, coolant, oil, and filter)
Sender and / or pump assembly, fuel (Tank Unit) replace.

Then-- the tech said the car would not start after he had it all back together.. so:

Powertrain Control Module Replacement (this was the computer they mentioned)

I now need to touch base with Hummer on my case file, but it sounded like they will be increasing the warranty on the engine.. I'll post more when I get the final info!

[Dani]

Originally Posted by Drew Slothower

I now need to touch base with Hummer on my case file, but it sounded like they will be increasing the warranty on the engine.. I'll post more when I get the final info!

Hopefully you have better luck with your head replacement than I've had with mine. I've had the head replaced 3 times on my H3. The 3rd time they replaced the head- it wouldn't start. My error code came up as the timing.

[westhillsat]

Mine is currently in the shop having the replacement done.
The light came on with a little over 7,000 miles on it.
I have my extended warranty letter in hand.

My second H3 and I would buy another one.

[marin8703]

Originally Posted by Drew Slothower

I forgot to post: The H3 has approx 21k miles on it, about 1.5 years old.

f5fstop -- the codes I saw on the display were:

Traction Failed
Service Stab Sys
Reduced Power
Check engine light on

then, I turned the car back on:

Fuel showed as empty
Engine light still on

I turned everything off, got out to check everything. I turned the car on a third time:

Only check engine light on.


After the H3 was towed to the dealer, they ran a test saying that the engine failed a pressure test, and the head needed to be replaced. It also sounded like there were some diagnostic codes that were identified as well that told more of the story of the problem.

They said the fuel issue was due to something called the 'Fuel sending system' (I don't have my notes, but they did not refer to it as the fuel pump)

weird, i got the exact same codes and lights (except for the fuel gauge malfunction) when my ABS encoder craped out.

what would traction and stab system have to do with a bad head?

glad you got it taken care of though.