Ignition coils help your vehicle's engine run efficiently, cleanly, and smoothly. Rough running, lower than expected mileage, or trouble codes are sure signs that it's time to replace yours. And, since worn spark plugs can damage ignition coils, it's best to replace those at the same time. How to install new, quality, TRQ ignition coils, and new spark plugs, on your 2008-13 Cadillac CTS.
How to bleed your brakes and purge your own brake fluid if you have soft brakes or have replaced your brakes. The 1A Auto experts will show you how to safely purge air from your brake system by yourself.