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General information about the various mods available to 4x4 vehicles covering pros and cons to assist in the decision of "Is this the right mod?"

John Stewart

JK Check Engine Light - P0300

One morning I slid behind the wheel of my Jeep, slid the key into the ignition, and tried to start the engine.  I was met with the ominous clicking indicating a low battery.  And, the dash was ablaze with a series of warning lights.

First step, get the engine started.  I carry an emergency battery pack that provides the necessary power to start a vehicle engine.  Within minutes, the engine was started and running very rough.  The dash warning lights were reduced to two, the Electronic Throttle Control warning and the Check Engine Light.

The ETC warning was a simple fix with a few key clicks and timed pressing the throttle pedal.  While that warning light was quickly cleared, the Check Engine Light remained on and idle remained very rough.

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John Stewart

Silverado Headlight and Upgrade Options Technical Guide

How to Improve 2nd Generation Silverado Illumination – AmericanTrucks’ Tech Guides

PAOLI, Pa. (October 8th, 2019) – When it comes to truck lighting, the 2nd generation (2007-2015) Chevrolet Silverado gets the short end of the stick in terms of truck headlights. Owners of 2007-2015 Silverados do not have to suffer from lackluster lighting output due to inferior halogen bulbs. Advancements in lighting technology continue to provide alternatives to remedy dim Silverado headlights, such as LED’s, HID’s, and improved headlight housings.

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John Stewart

Axial $5,000 Wrangler and Tacoma Parts Giveaway

Win a $5k Shopping Spree on ExtremeTerrain.com | Sponsored by Axial

PAOLI, Pa. (Oct 9, 2019) – Attention Wrangler and Tacoma owners: here is your chance to win a $5,000 parts spree on ExtremeTerrain.com (XT). Sponsored by Axial, manufacturer of off-road LED lighting, the Axial $5,000 giveaway will award one finalist with $5K to spend on XT’s site. Even though Axial is exclusive to XT and known for LED lighting, the winner can select products from any category on XT’s site including: Tacoma Grills, Jeep Wheels, and Jeep Seat Covers.

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John Stewart

How to Choose the Right Wrangler Lift Kit

Choosing the Right Lift Kit and Supporting Mods – ExtremeTerrain’s Technical Guides


PAOLI, Pa. (Oct 1, 2019) – When it comes to lifting a Jeep Wrangler, there are several factors to consider before selecting the perfect lift kit. Aspects such as use, budget, and tire size are important to keep in mind when “jacking up” a Jeep. With a variety of options and ways to elevate Jeeps, from budget spacer lifts to complete Wrangler suspension kits, the volume of aftermarket support can become inundating.

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John Stewart

Jeep Wrangler Fluid Capacities

ExtremeTerrain’s Tech Guides: YJ, TJ, JK & JL Wrangler Fluid Capacities

PAOLI, Pa. (September 19th, 2019) – Motor oil, coolant, brake, transmission, power steering, and differential fluids are the lifeblood of automobiles everywhere. Supporting the mechanical functions necessary for acceleration and braking, these vital liquids lubricate, isolate, and thermally protect a vehicle’s mechanical components. Knowing what type, as well as the quantity, when replenishing or replacing fluids can save a lot of headache as well as prolong the life of your Jeep Wrangler’s engine.

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