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Old 04-07-2021, 11:48 AM   #1
Mr_Rich
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2000 Tahoe; '99 5.7L?

My SO has a friend with a 2000 Tahoe DOA. They suspect a bad fuel pump and asked if I could replace it. We were visiting the other night and as we were leaving I decided to look underneath the vehicle. The owner claims it has an LS engine. What I saw underneath was not an LS but a standard Gen I SBC steel oil pan on the engine. Was this an early 2000 with a Gen I engine before GM made a run of 2000 Tahoe's with LS engines?
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Old 04-07-2021, 12:38 PM   #2
Palf70Step
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Re: 2000 Tahoe; '99 5.7L?

I think they came with both 4.8, 5.3 and 5.7 for that year. At least the specs I looked up on line at Edmonds listed all 3 as possible options.
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Old 04-07-2021, 12:45 PM   #3
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Re: 2000 Tahoe; '99 5.7L?

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Originally Posted by Palf70Step View Post
I think they came with both 4.8, 5.3 and 5.7 for that year. At least the specs I looked up on line at Edmonds listed all 3 as possible options.
Thanks! That kind of verifies my suspicions. I'll discuss this with the owner later this week.
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1989 K1500 Chev. EC
Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit.
2009 Hummer H3T 3.7L 5M (sold)
1997 K2500 Chev. EC 7.4L/ 4L80E
2018 Dodge Ram 2500 HD R/C
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Old 04-07-2021, 01:18 PM   #4
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Re: 2000 Tahoe; '99 5.7L?

I believe the 2000 SUV is a T400 chassis with the last generation 5.0 & 5.7L Vortec smallblock engines.
The 2000 2500 & 3500 pickups could be either T400 or T800. GM made both in 1999, 2000, & 2001.
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RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
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Old 04-08-2021, 01:04 PM   #5
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Re: 2000 Tahoe; '99 5.7L?

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Originally Posted by hatzie View Post
I believe the 2000 SUV is a T400 chassis with the last generation 5.0 & 5.7L Vortec smallblock engines.
The 2000 2500 & 3500 pickups could be either T400 or T800. GM made both in 1999, 2000, & 2001.
I'm asking questions about vehicles that are over twenty years old now. It probably had something to do with the changeover in body styles that is confusing. Something like the 2000 T400 Tahoe (old) vs. the 2000.5 T800 Tahoe (new). I think we can probably state that the factory didn't install LS engines in T400 chassis.
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1989 K1500 Chev. EC
Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit.
2009 Hummer H3T 3.7L 5M (sold)
1997 K2500 Chev. EC 7.4L/ 4L80E
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Old 04-08-2021, 02:04 PM   #6
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Re: 2000 Tahoe; '99 5.7L?

found this on line
All-new Tahoe and Yukon are launched. Side-impact airbags are standard for driver and front passenger, OnStar communications system optional, automatic headlamp control standard, Power-operated sunroof optional for first time, new uplevel 9-speaker audio system with rear mounted subwoofer, Driver Message Center, new PassLock II theft-deterrent system, Autoride Suspension system optional on Tahoe LT and Yukon SLT, all-new independent SLA front suspension with torsion bars and all-new five-link rear suspension with coil spring

The GMT400 Tahoe was carried over into the 2000 model year as two "Limited Edition" models: the 4X2 Limited, and the 4X4 Z/71. Both models were discontinued after the 2000 model year. The GMC Yukon Denali was redesigned for the 2001 model year, and the Cadillac Escalade was redesigned in 2002 (there was no Escalade for the 2001 model year).
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Old 04-08-2021, 05:58 PM   #7
1976gmc20
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Re: 2000 Tahoe; '99 5.7L?

I used to know somebody that bought a brand new 1999 or 2000 Suburban and I'm pretty sure it was the newer 99-06 body style.
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Current/past Chevy/GMC trucks:
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Old 04-09-2021, 10:10 AM   #8
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Re: 2000 Tahoe; '99 5.7L?

Quite possibly it was a 1500 series Suburban.
It may only be the 3/4 ton chassis were available as the older T400 just like the pickup trucks. It wouldn't surprise me to find that the 2500 Suburban was available in only T400 or both T400 & T800 chassis.

GM did this odd mix of builds with the CK T400 and RV squarebodies from 1988-1991. The SUVs just plain didn't get a facelift til 1993. The dually, 3500, and 2500 pickup was available with either body style through 1991.

The MD chassis has seemed to use the older cabs past production of the light duty trucks. 67-72 cabs into the mid 70's and round headlights into the 1980's. My guess would be that commercial users likely don't care about a facelift so there's no push.
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1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
1972 Ford F250 FE390, NP435/NP205 SOLD
1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8


RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
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Old 04-09-2021, 01:47 PM   #9
1976gmc20
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Re: 2000 Tahoe; '99 5.7L?

Quote:
Originally Posted by 1976gmc20 View Post
I used to know somebody that bought a brand new 1999 or 2000 Suburban and I'm pretty sure it was the newer 99-06 body style.
Quote:
Originally Posted by hatzie View Post
Quite possibly it was a 1500 series Suburban.
It may only be the 3/4 ton chassis were available as the older T400 just like the pickup trucks. It wouldn't surprise me to find that the 2500 Suburban was available in only T400 or both T400 & T800 chassis.

GM did this odd mix of builds with the CK T400 and RV squarebodies from 1988-1991. The SUVs just plain didn't get a facelift til 1993. The dually, 3500, and 2500 pickup was available with either body style through 1991.

The MD chassis has seemed to use the older cabs past production of the light duty trucks. 67-72 cabs into the mid 70's and round headlights into the 1980's. My guess would be that commercial users likely don't care about a facelift so there's no push.
Yes! I told this woman that I was working for at the time that she should buy a 3/4 ton Suburban for towing heavy horse trailers but the dealer talked her into a half ton. At least it was a better choice than the original Grand Cherokee (ZJ ?) that she was using

That said, she let me drive it a short distance and it was impressively solid
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