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For informations sake , you might check the history of the truck at a GM dealers to see if the IP has ever been changed & at what mileage . Wont prove anything but the info may help you decide in what direction to head first.

Some info from google search reports at least some of Robert Shaw taken over by Cooper & marketed under Prestone name.

Might not look too classy ,but some guys have reported shimming up hood at hinges to let air thru.

So, can we add Prestone Tstats to the the list of "approved" ones along with Delco & Robert Shaw?

Good to have a bit of noise to tell a person its working.

See post # 21 re availabity .

You sure have mine .

With the engine noise these trucks make, cross over leaks can go unnoticed ( in my case at least) & affecting boost .

Sitting still, if I have brake pedal depressed, power steering sometimes inoperative eg pulling out of a tight parking spot . Seems normal once truck is moving . I put it down to excess load on pump ?

Maybe check compression reading on cyl 6 in particular.

Some early 97,s reported to have the 141 block as well .

Cant answer your questions directly re location & disabling ,but you might try a google search on theft deterrent for 6.5 diesel lots of info for relearns . See also faqs at Diesel place .

Meant to include that youve most certainly added greatly to the human side of the site as well as sorting out truck problems.

Shocked, Been a great contributor . . Stay with us ,& maybe we can help with the Side Kick as well your good help with sorting out the problems that arise here.

You would think it would at least fire with that much fuel having got to the cylinders Back to thinking about timing (injection).Key partially sheared? Presume rings are ok? Compression test ? You would think some of that fuel would have gone out the exhaust as white smoke . If injection timing...

Maybe before & if contemplating changing PCM try connecting & disconnecting wiring harness to PCM ,as Gmctd used to say ,to "burnish" the connectors to get better conductivity. Also where wiring harness comes thru firewall reported to be a potential trouble area (broken wires I think). A...

Has been talk on here that obdIs would be ok (default to a certain setting) but that obdII,s when a relearn was done ,after 50 starts or whatever may or or may not start.

With optic sensor unplugged & no start, believe that could indicate a problem with crank position sensor ( note that youve changed it). If cps is ok it should start in limp mode but may need extended cranking time iirc. Wonder if no fire using starting fluid might indicate a timing problem?

Ditto on Bisons story re setting the truck on fire .Went thru that gut wrenching experience when my son & I ( mostlly him) did the cross over on my truck.Sure is no flame retardent in that fire wall insulation . As he says , keep a pail of water handy or a garden hose.

Getting off topic ,but I,ve found the hygrometor used to test battery is a fairly safe & handy tool for adding water.