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2007 GMC Sierra 1500 Crew Cab SLT - 2007 4x4 Of The Year

Posted in Project Vehicles on February 1, 2007 Comment (0)
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Contributors: Rick Péwé
Photographers: David KennedyDrew HardinFrank KaislerTrevor ReedThe 4-Wheel & Off-Road Staff

GMC is the truck-dedicated segment of GM and as such you would expect it to have the burliest of machines for both work and play. The Sierra was the brute of the week. The GMC Sierra Crew Cab we tested was one big step ahead of the Chevy Silverado in our test, and that step is comprised of an extra 50 horses and 40 pound-feet from the 6.0L of small-block under the hood. This is the engine that pushed us back in the seat during high-speed desert runs, and made this the truck of choice for banging across the dunes. Unfortunately with that powerful engine came a rear suspension designed for heavy hauling, and "compliant" doesn't come to mind in any off-road ride description. Additionally the factory "automatic locking differential" performed more like a good old GovLoc since it is, rating a solid 7 on a 1 to 10 scale, possibly due to Goodyear rubber versus the Bridgestones on the other GM entrants. The Crew Cab we tested had the much cushier SUV interior that lacks the many handy storage places found in the "truck" interior (the Silverado had the "truck" interior), and it also has the moronically placed transfer-case dial next to the identically sized headlight dial. One thing we would love to get our hands on is the elusive Denali edition Sierra that comes Crew Cab only with a hearty 6.2L 400-horse aluminum V-8. Though we've yet to determine if it will come with a low range or only an all-wheel-drive transfer case, this truck just may be the gas-powered variant of choice since the big-block 8.1L won't be returning. One idea we wouldn't mind seeing is a dedicated GMC off-road work/play truck to contend with the Dodge Power Wagon. Give us the 6.2, a 3:1 low range with a lever to activate it, a regular or extended cab with a short bed, and front and rear lockers between 33-inch Goodyears. Don't bother us with fancy stuff. Rubber floor mats and stainproof seats would be fine. Just build the truck all the kids will be drooling over. We'll add bumpers and a winch if your legal department won't allow it even though Dodge was able to get around that.

Likes
* 6.0L engine is burly
* Great dune blaster
* Plenty of room for people
Dislikes
* Suspension too stiff for wheeling
* Woodgrain in a truck?
* Front plow bumper

Verdict
Power overcomes most obstacles

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General
Manufacturer GMC
Model Sierra 1500 4WD Crew Cab SLT
Base Price $37,620
Price as Tested $44,224
Options as Tested

Ebony interior, Stealth Gray Metalic exterior, head-curtain side-impact airbags, cargo management, XM satellite, AM/FM with MP3, CD player, multimedia navigation radio, Work-truck Towing Package (high-capacity air cleaner, transmission cooling system, heavy-duty differential, heavy-duty trailering equipment). Convenience Package (remote start, rear parking-assist camera, adjustable pedals), EZ-lift Tailgate Package (locking tailgate, EZ-lift tailgate), Off Road Package (off-road suspension, heavy-duty rear differential with locking differential, skidplates)

Engine
Type Vortec V-8 with active Fuel Management
Displacement (liters/cubic inches) 6.0/364
Bore & Stroke (inches) 4.00x3.{{{62}}}
Compression Ratio 9.6:1
Induction Type Sequential, multiport fuel injection
Fuel Req. (octane)/Capacity (gal.) 87/26
SAE Peak Horsepower 367 @ 5,500 rpm
SAE Peak Torque (lb-ft) 375 @ 4,{{{300}}} rpm
Transmission
Type Four-speed automatic
Model Hydramatic 4L65/M32
Ratios First: 3.06:1; Second: 1.63:1 Third: 1.00:1; Fourth: 0.70:1; Reverse: 2.29:1
Transfer Case
Type Two-speed, full-time
Model Magna Auto Track
Low-range Ratio 2.72:1
Axles
Front Type IFS
Rear Type Solid
Hubs N/A
Ratio 3.73:1
Suspension
Front Independent coilover shock; monotube shock absorbers
Rear Solid axle with semi-elliptic, variable-rate, two-stage multileaf springs; splayed shock absorbers; monotube shocks
Steering
Type Power-assisted rack-and-pinion
Turns Lock-to-Lock/Ratio 3/16.5:1
Turning Radius (feet) 47.2
Wheels
Size (inches) 17x7.5
Material Cast-aluminum
Tires
Size P265/70R17
Brand Goodyear {{{Wrangler}}} AT
Brakes
Front 13.0-inch discs with ABS
Rear 13.5-inch discs with ABS
60-0 (feet) 135.5
Acceleration
Standing 1/4-mile(seconds @ mph) 17.61 @ 70.52
Weight (pounds)
Curb Weight 5,278
Advertised GVWR 7,000
Mileage
EPA Estimate (city/hwy. mpg) N/A
As Tested (mpg) 12.08
Dimensions (inches)
Wheelbase 143.75
Overall Length 232
Overall Width 95.5
Overall Height 73.5
Front/Rear Track 68/67
Front/Rear Overhang 40.5/46.5
Min. Front Ground Clearance 9.125

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