1998 GMC T6500 - Whats the better motor Isuzu 7.8L vs. CAT 3126 - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 5 (permalink) Old 12-17-2016, 09:04 AM Thread Starter
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1998 GMC T6500 - Whats the better motor Isuzu 7.8L vs. CAT 3126

Hi Guys, I'm trying to buy a 1998 or 1999 T6500 cabover, and they seem to either have an Isuzu 6 cylinder or a CAT diesel. Which is the better motor to have? Any reliability issues with either? Common problems or things to look out for? How long can they run for?(all of these trucks seem to have about 200k miles on them..)
Which motor would you rather have?

Thanks for the help!
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post #2 of 5 (permalink) Old 12-18-2016, 02:08 AM
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Nevrenufhp is the goto on those motors.
I'd get the 3126.
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post #3 of 5 (permalink) Old 12-18-2016, 06:29 PM Thread Starter
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I've got a line on one for a great price right now. But it's got an Isuzu motor. Why would you prefer the CAT, Jasong?
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post #4 of 5 (permalink) Old 12-19-2016, 02:13 AM
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Lots of parts available, common motor.
Fairly easy to work on, but I'm only a shade tree mech.
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post #5 of 5 (permalink) Old 12-20-2016, 05:55 AM Thread Starter
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Anyone know if I can retrieve my private messages through Tapatalk?
Doesn't look like it..🤔

Sent from my Z981 using Tapatalk
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