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If you suspect bad plug(s), the LB7 fed emissions may not set the SES and a code on only one or a couple (CA emissions will fault on one weak plug)....

Thanks for the followup. I suspect the LB7 in my 2001 GMC has a bad glow plug. The 4 plugs in each bank are connected together using a buss bar....

Damn diesel prices are jumping around here. TA truck stop near I40 Monday $4.29 Tuesday $4.12 Wednesday $4.26

I paid $4.29 yesterday.... Casey

E Tennessee Diesel $4.09 to 5.29 Reg $3.49 to 4.06 last few days the prices have been moving daily before that it was weekly Or they would drop...

Still mid $5 here in the west suburbs of Chicago.

I'm jealous!

Diesel prices around here range from $4.99 to $6.29. Go figure...

Down to $4.38 here as of this morning. Paid $3.19 for gasoline on Sunday. Casey

Thanks for the follow up MP I have them working now. Replaced 4 and 8 and its been 3 weeks now.

Diesel fuel finally went below $5/gal about a week ago.

You'll find a bad fusible link by load testing each GP at its location. Probe the wire that connects to it in series with the other meter probe on...

The EPA might start to have a better disposition... Since the their hands got whacked by the supreme court.

That's great! It's always nice when we get stuff figured out. I went through something similar on my 2001 Duramax a few months back. There's no...

Thanks DmaxMaverick, you saved me. It wasn’t the PCM, as I had a spare that I tried, and it wasn’t the temp sensor, unplugging it didn’t help, I...

"Information"... can sometimes be the hardest "thing" to acquire for any type of service project. It's hard because the best information can only...

Harmonic balancer is in OK condition. I think a cylinder full of water and freezing took it out. Hopefully the hole in the oil line dosn't lead to...

I wouldn't take that bet. Those cracks, if they are cracks, happened long after it quit running. Robyn likely has it right. This was a block, on the...

That hole looks pretty sad....Is that a break through the cylinder wall ???? WATER THAT FROZE OR OTHER ISSUE ????

Does that crack extend all the way from one of the webs? I bet it was from a toasted Harmonic Balancer?

Yes the positive note... Complete fuel injection system with a 4911 pump One head with no visible cracks,complete set of precups with no cracks,and...

Great, I’ll check that out. Thanks very much.

GM engineer told me that the early T1 trucks (19 to 22 classic) were actually a modified K2 platform truck and that the electronic issues are gone on...

The PCM temp sensor is in the thermostat housing, and is the only ECT (Engine Coolant Temperature) value the PCM "sees". If this sensor fails, it...

Great, that’s just what I needed to know. If you could point me to where the temp sensor is, that would be extra helpful! Otherwise I’ll start...

The PCM controls the relay and the indicator (via the IPC logic board). If you need to start and it doesn't because the plugs won't cycle, unplug the...

I’ve been using the Suburban every day for the last two weeks and it’s been starting well and running great. I’ve been in the Las Vegas area, and...