jQuery not supported.



5.3L engine

what are different codes

5.3L engine

Postby matheny9 [OP] » Sep 19 2010, 12:06am

What is the difference between Active Fuel Management engine and XFE engine? Also what is the difference between (LMG) K5L and just K5L when looking at tow ratings?
Original Poster
matheny9
Combustion on 1 piston [L2]
Combustion on 1 piston [L2]
Posts: 146
Topics: 44
Joined: Aug 07 2010, 3:32am
Years of membership: 4 years of membership4 years of membership4 years of membership4 years of membership
Location: Lagrange GA
Year: 2010
Make/Model: Chevrolet Silverado
Extra Info: 1500 5.3L
Group Membership:
Registered users

Re: 5.3L engine

Postby matheny9 [OP] » Sep 19 2010, 2:02am

ok, I found out the LMG(K5L) is the iron block motor w/cooling pkg and the K5L is the aluminum block and cooling pkg.
But have not found out the difference between the XFE engine and Active Fuel Management engine if it is all the same thing or different. But I do wonder why the aluminum block motor has a larger tow rating than the iron block?
Original Poster
matheny9
Combustion on 1 piston [L2]
Combustion on 1 piston [L2]
Posts: 146
Topics: 44
Joined: Aug 07 2010, 3:32am
Years of membership: 4 years of membership4 years of membership4 years of membership4 years of membership
Location: Lagrange GA
Year: 2010
Make/Model: Chevrolet Silverado
Extra Info: 1500 5.3L
Group Membership:
Registered users

Re: 5.3L engine

Postby Z15 » Sep 19 2010, 11:43am

LC9 is the aluminum block 5.3L (my 2010 has this engine)

The XFe does not use a special engine, it uses the LC9

Here are the two 5.3L engines available for 2011 model year

Both of the engines are AFM
LC9 Engine, Vortec 5.3L Variable Valve Timing V8 SFI FlexFuel
LMG Engine, Vortec 5.3L Variable Valve Timing V8 SFI FlexFuel


The XFE uses the LC9 aluminum block along with lighter weight suspension components and aerodynamic enhancements.

---------------------------------------------------------------------------------------------------------------------------

LMG Engine, Vortec 5.3L Variable Valve Timing V8 SFI FlexFuel with
Active Fuel Management, capable of running on unleaded or up
to 85% ethanol (with gas - 315 hp [234.8 kW] @ 5200 rpm, 335
lb-ft of torque [452.2 N-m] @ 4000 rpm, with E85 ethanol - 326
hp [243.1 kW] @ 5300 rpm, 348 lb-ft of torque [469.8 N-m] @
4400 rpm), iron block
1 - Not available with TK10543 or TK10753 models.
2 - Not available with TK10543 or TK10753 models. On TC10543 or
TC10753 retail orders require (PDU) Power Tech Package, (PDA)
Texas Edition or (PEB) Regional Value Package.


LC9 Engine, Vortec 5.3L Variable Valve Timing V8 SFI FlexFuel with
Active Fuel Management, capable of running on unleaded or up
to 85% ethanol (with gas - 315 hp [234.8 kW] @ 5200 rpm, 335
lb-ft of torque [452.2 N-m] @ 4000 rpm, with E85 ethanol - 326
hp [243.1 kW] @ 5300 rpm, 348 lb-ft of torque [469.8 N-m] @
4400 rpm), aluminum block
1 - Requires TK10543 or TK10753 models.
2 - On TK10543 or TK10753 retail orders require (PDU) Power Tech
Package, (PDA) Texas Edition, (PEB) Regional Value Package or
(GAT) All-Terrain Package.
Mike
Image Dealer

Image
User avatar
Z15
Recognized Supplier
Recognized Supplier
Shifting into Sixth Gear! [L3]
Shifting into Sixth Gear! [L3]
Posts: 2559
Topics: 132
Images: 8
Joined: Jun 02 2010, 7:24pm
Years of membership: 4 years of membership4 years of membership4 years of membership4 years of membership
Location: Hubbell, Michigan
Year: 2012
Make/Model: GMC Sierra
Variant: Denali
Extra Info: AWD 6.2L
Group Membership:
Vendors
Registered users
Servicemen

Re: 5.3L engine

Postby lzn197 » Sep 19 2010, 2:05pm

From what I remember, the tow rating is higher with the aluminum block engine because of the lighter weight of that engine assembly. The vehicle has less to tow around!

Time to remove the extra keys from that key chain huh? LOL!
Gordon
2004 Chevrolet Silverado Extended Cab Z71
Semi-retired Master Mechanic
User avatar
lzn197
ASE Certified
ASE Certified
4x4 High Mode [L3]
4x4 High Mode [L3]
Posts: 1814
Topics: 6
Images: 22
Joined: Apr 01 2010, 3:45pm
Years of membership: 4 years of membership4 years of membership4 years of membership4 years of membership
Location: Central Michigan
Year: 2004
Make/Model: Chevrolet Silverado
Extra Info: K1500 5.3L Z71 EX
Group Membership:
Automotive Technicians
Registered users

Re: 5.3L engine

Postby Z15 » Sep 19 2010, 2:14pm

Yes that is likely the reason but the torque and HP is up a tad on the XFE (ECM tuning) so that will add to it.

some more info on the XFE line...
XFE models are only available in two-wheel drive with GM’s E85-capable LC9 5.3-liter V-8 and new six-speed automatic transmission. The LC9 uses an aluminum engine block and aluminum cylinder heads to save weight. It also features active fuel management, which switches the V-8 between four-cylinder and eight-cylinder mode, depending on engine load, to save gas. Power has been boosted slightly, to 320 horsepower and 340 pounds-feet of torque, up from 315 hp and 338 pounds-feet of torque in non-XFE trucks with the same engine.

GM has lowered the XFE’s aerodynamic drag to a claimed best-in-class .412, narrowly beating the all-new 2009 Dodge Ram’s .419 coefficient of drag. Helping the XFE achieve that slippery wind rating are a soft tonneau cover, an extended front chin spoiler and a 10-mm-lowered suspension and ride height. Low-rolling-resistance tires and lightweight 17-inch aluminum wheels help reduce friction between road surfaces and the truck.

The XFE also uses an unusually tall 3.08 rear axle to hit its higher fuel economy numbers. To understand why this is important, it helps to understand how rear axles are rated. Rear axles are assigned numbers that describe how many rotations the driveshaft must make to turn the rear axle (and rear wheels) once. A 3.08 rear axle turns the wheels once for every 3.08 driveshaft rotations.

The rear axle ratio can make a big difference in performance and fuel economy. The numerically higher the ratio (counter-intuitively, the shorter it is), the faster the driveshaft turns and the sooner the driveshaft can transfer peak horsepower and torque from the engine to the rear wheels. The result, generally, is faster acceleration and higher towing capacity than a rear axle with a numerically lower (taller) ratio. The tradeoff for a shorter axle ratio, though, is usually lower fuel economy because an engine that's working harder is also burning fuel faster. The taller the rear axle, the more effort the truck requires to get a running start, the less it can tow and the more efficiently it will run at highway speeds.


So if you alter the truck by changing tires and wheels, you are no longer getting the benefits of the XFE.
Mike
Image Dealer

Image
User avatar
Z15
Recognized Supplier
Recognized Supplier
Shifting into Sixth Gear! [L3]
Shifting into Sixth Gear! [L3]
Posts: 2559
Topics: 132
Images: 8
Joined: Jun 02 2010, 7:24pm
Years of membership: 4 years of membership4 years of membership4 years of membership4 years of membership
Location: Hubbell, Michigan
Year: 2012
Make/Model: GMC Sierra
Variant: Denali
Extra Info: AWD 6.2L
Group Membership:
Vendors
Registered users
Servicemen

Re: 5.3L engine

Postby lzn197 » Sep 19 2010, 2:26pm

Great information Z15. Thanks for sharing. A friend told me that the other day he went to GM's Chevrolet site to build a truck, starting with the XFE model and the minute he added a towing package, the truck changed to a non XFE model. Mind games!
Gordon
2004 Chevrolet Silverado Extended Cab Z71
Semi-retired Master Mechanic
User avatar
lzn197
ASE Certified
ASE Certified
4x4 High Mode [L3]
4x4 High Mode [L3]
Posts: 1814
Topics: 6
Images: 22
Joined: Apr 01 2010, 3:45pm
Years of membership: 4 years of membership4 years of membership4 years of membership4 years of membership
Location: Central Michigan
Year: 2004
Make/Model: Chevrolet Silverado
Extra Info: K1500 5.3L Z71 EX
Group Membership:
Automotive Technicians
Registered users

Re: 5.3L engine

Postby rangerjoe » Sep 20 2010, 3:03pm

My '10 XFE has the trailer towing package rated I think at 6,000 pounds.
rangerjoe
Firing on 2 cylinders [L1]
Firing on 2 cylinders [L1]
Posts: 21
Topics: 5
Joined: Aug 30 2010, 10:07pm
Years of membership: 4 years of membership4 years of membership4 years of membership4 years of membership
Location: Oswego, IL
Year: 2010
Make/Model: Chevrolet Silverado
Extra Info: XLE 2wd crew
Group Membership:
Registered users

Re: 5.3L engine

Postby NIBS » Dec 16 2010, 4:45pm

Just purchased a 2010 GMC Sierra SLT Z71 4x4. Every option on this truck. Extra cooling, tow package, belly plates, manual shift mode, 5.3L w/ HD 6 spd trans, power everything and it has the aluminum block with AFM and flex fuel. 11,000 KMs on the odometer and I’m waiting to see better fuel economy than my plain Jane 04 Silverado 4x4. Granted, this truck is heavier due to a beefed up frame and suspension. Any thoughts or real world numbers experienced with the same truck model and accessories?

Apologies for the garble below. It is the spec sheet for my truck.


Options
Features
Tech Specs
POWERTRAIN Cylinder deactivation Limited slip differential Cylinder configuration: V Variable valve control Fuel economy highway: 9 km Manual-shift auto Sequential multi-point fu injection Number of valves: 16 Recommended fuel: flexi Transmission: 6 speed auto, Fuel tank capacity: 98.4L Fuel economy city: 14.4L Drive type: four-wheel Mode select transmission SUSPENSION/HANDLI Power steering Alloy wheels Front anti-roll bar Front wheel independent suspension, 3.42 Rear Axle Ratio 6" Chrome Oval Assist Steps Camera Display in Rearview Mirror w/Auto Dimming Chrome Accessories Package Chrome Door Handles Chrome Grille Chrome Mirror Caps EZ Lift Tailgate Engine: Vortec 5.3L V8 Flex FuelAM/FM radio

ENTERTAINMENT FEATURES Speakers: 7 Steering wheel mounted audio controls 1st row LCD monitors: 1 CD player Radio data system Wireless connectivity MP3 decoder, SFI External Transmission Oil Cooler Fleetside Body Ordering Code GVWR: 3,175 kgs Heavy Duty Trailering Special Equipment High Capacity Air Cleaner Integrated Trailer Brake Control Locking Differential Locking Tailgate Off Road Suspension Package Off-Road Skid Plates Power Adjustable Pedals Preferred Equipment Group 1SD Radio: AM/FM Stereo w/CD Player & MP3 Playback Rear Parking Assist Rearview Camera System SLT Convenience Package SLT Model Option Tailgate Package Tires: P265/65R-18 BW SBR
SEATS AND TRIM Power passenger seat Power driver seat Front seats: bucket Front centre armrest Split folding rear seat Leather upholstery Heated front seats Rear seats: split-bench

CONVENIENCE FEATURES

Power windows Auto-dimming rearview mirror.
On/Off Road Transmission: HD Electronic 6- Speed Automatic w/OD Universal Home Remote Wheels: 18" Chrome Clad Aluminum XM Satellite Radio
Remote keyless entry Passenger door bin Rear beverage holders Passenger vanity mirror Driver vanity mirror Overhead console 1-touch down windows
Memory seat Automatic temperature control Front beverage holders Emergency communication system Illuminated entry Speed control Driver door bin Air conditioning Garage door transmitter Front dual zone A/C Tilt steering wheel Rear door bins Adjustable pedals BODY EXTERIOR Power door mirrors Rear step bumper Turn signal indicator mirrors Trailer hitch receiver Bumpers: chrome Auto-dimming door mirrors Heated door mirrors Bodyside mouldings Skid plates Door mirrors: chrome LIGHTING, VISIBILITY AND INSTRUMENTATION Front reading lights Front fog lights Low tire pressure warning Delay-off headlights.

Outside temperature display Fully automatic headlights Oil pressure gauge Reverse sensing system Tachometer, Rear window defroster Rear reading lights Trip computer Variably intermittent wipers Voltmeter, Compass SAFETY AND SECURITY Overhead airbag Ignition disable Electronic stability Dual front impact airbags ABS brakes Perimeter/approach lights Panic alarm Occupant sensing airbag Security system Traction control.
User avatar
NIBS
Firing on 1 cylinder [L1]
Firing on 1 cylinder [L1]
Posts: 16
Topics: 2
Images: 0
Joined: Dec 16 2010, 4:12pm
Years of membership: 4 years of membership4 years of membership4 years of membership4 years of membership
Location: Canada
Year: 2010
Make/Model: GMC Sierra
Extra Info: SLT Z71
Group Membership:
Registered users

Re: 5.3L engine

Postby ffhillclimber » Oct 21 2013, 7:10pm

I've got a simular 2010 GMC Sierra crew cab with 50K. I'm getting 21 highway milage when I try.
ffhillclimber
Newbie
Newbie
Posts: 1
Joined: Mar 03 2013, 5:26pm
Years of membership: 1 year of membership
Location: United States
Year: 2010
Make/Model: GMC Sierra
Extra Info: 5.3 L V8 STE
Group Membership:
Registered users

Re: 5.3L engine

Postby TJEli » Oct 21 2013, 7:18pm

What determined whether or not a truck got the LC9 or the LMG engine?

-Eli
2008 Silverado 1500, CC, LTZ, Z71, L76 Vortec Max, Deep Ruby
Diablo InTune, Corsa Touring, Bilstein 5100s, ReadyLift 2.25 rear, A/T KOs, TruXedo Lo-Pro

2015i Silverado 2500HD, RC, LB, LT, 4x4, 6.0 Tungsten Metallic
TJEli
Combustion on 3 pistons [L2]
Combustion on 3 pistons [L2]
Posts: 341
Topics: 41
Joined: Nov 17 2012, 4:35pm
Years of membership: 2 years of membership2 years of membership
Location: Iron Mountain, MI
Year: 2008
Make/Model: Chevrolet Silverado
Variant: VHO/Vortec Max
Group Membership:
Registered users
Next

Return to Engine

 

  • Similar topics
    Replies
    Views
    Last post
  • what engine do i have?
    by pscbrenden » Aug 30 2010, 10:48pm
    6 Replies
    15290 Views
    User avatar
    Last post by country1911 View the latest post
    Dec 05 2012, 6:08am
  • 8 Replies
    91 Views
    Last post by SilveradoSierra.com View the latest post
    Dec 19 2014, 1:55pm
  • engine
    89 5.7tbi
    by string » Jun 19 2013, 4:41pm
    3 Replies
    253 Views
    Last post by ASTE25 View the latest post
    Jun 22 2013, 5:53am
  • Engine
    by jus10inla » Aug 10 2014, 11:16pm
    2 Replies
    215 Views
    Last post by jus10inla View the latest post
    Aug 11 2014, 12:47am
  • Engine Starting
    Hard Starting
    by sadlup » Mar 28 2010, 3:56pm
    2 Replies
    788 Views
    Last post by Custom_car_creations View the latest post
    Mar 29 2010, 1:03am
  • Engine stumble
    Engine has a miss and sometimes idles downs
    by rglickman » May 19 2010, 1:57am
    5 Replies
    2109 Views
    Last post by randomhero View the latest post
    Jun 21 2010, 12:45pm

Common search terms

engine same tires front rear make lift great thanks think help

It is currently Dec 19 2014, 1:55pm

  • Sponsor
Login  •  Register
SHOP TALK (Live Chat)
Engine Forum
EngineThis is where all of our engine discussion and conversation takes place. Talk about engine diagnostics, adjustments, modifications, performance and care. Motor tuning and repair to gain horsepower and fuel efficiency.
To create a new topic in Engine, click this button:
Previous topic Next topic
Sitewide News Sitemaps & Feeds

Who is online

Users browsing this forum: No registered users and 2 guests