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#1 |
Registered User
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,777
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1999 GMC Suburban K2500 DD
Why would anyone daily drive a Vortec 454 rig you ask...because AMERICA.
![]() I don't have a name just yet for this one, need a little more seat time. 1999 model year with 88k miles on the clock. To my surprise most of the need-to's have been done, including new 4-hole injectors. I'll do a few tune-up items, drop all the fluids (including the Dexcool), better exhaust, a tune, and drive the hell out of it. It came with PY0 16" wheels that will be re-shod with LT265/75R16 Yokohama Geolandars G015 A/T's. Ordered some 2" steel spacers to get the rear tires out where they need to be. Installed Savana van HVAV knobs and a full audio setup with a double din headunit and back up camera. So far I'm super excited to be back in a GMT400. This is replacing my fully loaded 2017 F150 Lariat crew cab...super nice pickup, just too "new" for me...I will miss the cooled seats and heated steering wheel, however! Pics to get us started. ![]() ![]() ![]() ![]()
__________________
1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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#2 |
Registered User
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,777
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Re: 1999 GMC Suburban K2500 DD
Hit the Burb with some Mothers CMX ceramic spray, jury is still out on how long it will last, but the shine is for sure nice!
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__________________
1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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#3 |
Registered User
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,777
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Re: 1999 GMC Suburban K2500 DD
Soooooo much better! New tires are on, I need the spacers for the rear wheels to be here now...soon.
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__________________
1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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#4 |
State of Confusion!
![]() ![]() Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,858
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Re: 1999 GMC Suburban K2500 DD
Good looking burb. She just screams, lets go help Mad Max get the bad guys!
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__________________
Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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#5 |
Registered User
Join Date: Dec 2012
Location: Temple City
Posts: 3,587
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Re: 1999 GMC Suburban K2500 DD
How is the highway mpg on the Burb?
I am looking at a van with the same engine with the concept of shedding payments. |
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#6 | |
Registered User
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,777
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Re: 1999 GMC Suburban K2500 DD
Quote:
I'm not sure yet, hoping for 13-15mpg on the highway. First around town tank was 11mpg. It still needs exhaust and a computer tune.
__________________
1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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#7 |
Registered User
![]() Join Date: May 2004
Location: Miss Co Arkansas
Posts: 679
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Re: 1999 GMC Suburban K2500 DD
Very nice find, but then you know I'm a lifelong fan of all things big block.😎
__________________
76/77/78 Cheyenne 1997 K3500 454 soon to be 496 |
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#8 |
Registered User
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,777
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Re: 1999 GMC Suburban K2500 DD
Thanks, somehow I knew you'd approve!
__________________
1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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#9 |
Registered User
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,777
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Re: 1999 GMC Suburban K2500 DD
My harness form CE Auto Electric Supply showed up early, again. These guys are awesome! Tony also put a handwritten "thank you" on the invoice...this is also not the first time this has happened. Great company can't say enough about them!
New Spyder headlights and TYC marker/park lamps are in, and the HD harness with my own 4hi mod is installed. Basically just need a diode between the Hi and Lo beams, you want 12v to trigger from the Hi side to the low side to make all 4 come on when you hit the Hi beams. Also pulled the grill guard off and has been put for sale with the Hella Comet 450 fog lights. ![]() ![]() ![]() ![]() ![]()
__________________
1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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#10 |
State of Confusion!
![]() ![]() Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,858
|
Re: 1999 GMC Suburban K2500 DD
Very enlightening.
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__________________
Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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#11 |
Registered User
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,777
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Re: 1999 GMC Suburban K2500 DD
Thanks Bill, I see what you did there!
__________________
1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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#12 |
Registered User
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,777
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Re: 1999 GMC Suburban K2500 DD
Spent a little time on the GMT800 console last night. Everything is painted/dyed to the correct interior color. Also finished the blank and installed the power ports and pigtails for the wiring.
I don't care for the 95+ torpedo...it only has usable space for one drink and the shape is a little too much for my liking. I had considered doing an 04-08 Ford F150 console, but they are just a touch too wide, tons more storage though... ![]() ![]() ![]() ![]()
__________________
1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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#13 |
Registered User
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,777
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Re: 1999 GMC Suburban K2500 DD
OK, so GMT800 console is painted and installed/wired. I used 1/8" thick 1.25" wide strap to make the brackets.
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__________________
1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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#14 |
Registered User
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,777
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Re: 1999 GMC Suburban K2500 DD
Popped the 2" spacers on Friday night, probably could have gone another 1/2" on each side, but is far better than it was!
Had some time to build brackets for my fogs on the diesel bumper, and put everything on. I'm still waiting on some electrical parts to do the wiring, but all the hard parts are installed. Probably should have done the bumper with the impact strip, but the smoothie is growing on me. ![]() ![]() ![]()
__________________
1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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#15 |
Registered User
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,777
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Re: 1999 GMC Suburban K2500 DD
__________________
1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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#16 |
Registered User
Join Date: Oct 2015
Location: PNW
Posts: 3,587
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Re: 1999 GMC Suburban K2500 DD
Very clean truck and I like you updates you made. That rig should serve you well and in comfort too. I would also be curious about your highway mileage when you get the chance to calculate it. Thanks.
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#17 | |
Registered User
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,777
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Re: 1999 GMC Suburban K2500 DD
Quote:
Last tank back and forth to work was 11.2mpg. This is with the Blackbear tuned ECU. Definitely drives much better
__________________
1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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#18 |
Registered User
Join Date: Oct 2015
Location: PNW
Posts: 3,587
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Re: 1999 GMC Suburban K2500 DD
Well that sounds all right. You can probably add a couple more MPG to that if you are on the highway for an extended period of time. What kinds of differences did you notice with the blackbear tune?
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#19 | |
Registered User
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,777
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Re: 1999 GMC Suburban K2500 DD
Quote:
At $2.50/gallon for fuel, it still costs me $1k less/year to drive an average of 15k miles over my 2017 F150. Tags/taxes and insurance are just sooo much cheaper.
__________________
1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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#20 |
Registered User
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,777
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Re: 1999 GMC Suburban K2500 DD
Haven't been very good at updating this thread on this forum.
![]() Still by far my favorite vehicle I have ever owned. Recently I upgraded to AD244 alternator and heavier gauge cables, new starter, AN engine oil cooler lines, and I'm in the process of polishing some 17" OEM GM wheels to replace the PY0's. I've got everything to do the front brakes, just need to get it done. Considering an 0411 ECM swap, but not ready to pull the trigger yet. ![]() ![]() ![]() ![]() ![]() ![]()
__________________
1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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#21 |
Registered User
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,777
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Re: 1999 GMC Suburban K2500 DD
Wheels, new tires, new center caps, new exhaust tip, and new LED reverse/load lights installed on the Suburban this weekend. Picked up a set of GMT400 specific center caps to use, really enjoying the look.
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__________________
1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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#22 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,375
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Re: 1999 GMC Suburban K2500 DD
The wheels look real nice. It warmed up to the 40s here yesterday so I fired up my 99 k2500 diesel after its winter nap. Any chance you want to part with the front bumper grille guard?
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#23 | |
Registered User
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,777
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Re: 1999 GMC Suburban K2500 DD
Quote:
OE front bumper and the grill guard are long gone, they sold within days of coming off back in 2020. This thread has some age on it now, I just haven't been doing a great job keeping it updated. There is a much more in-depth thread on gmt400.com.
__________________
1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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#24 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,375
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Re: 1999 GMC Suburban K2500 DD
Thanks. I'm on my second 99 suburban and really like the model. I may have a grille guard built locally this summer. I'll check the GMT400 site - I've not logged in there for a while. That was a real helpful resource when adding my roof marker lamps.
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1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#25 | |
Registered User
Join Date: Oct 2015
Location: PNW
Posts: 3,587
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Re: 1999 GMC Suburban K2500 DD
Quote:
I really like this truck and the functional updates. Where did you get your rear wheel spacers? I have looked into them and either found questionable sources or very expensive sources. Did you have trouble with the PY0s or did you just want to update the look of the wheels? You mentioned an ECM upgrade and I was curious what you would gain from that. I'll bet that it is a very nice truck to drive with the comfort, power, and ride feel. Last edited by LT7A; 03-19-2022 at 04:09 AM. |
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