J&M Auto Center
693 Grayson Highway St A, Lawrenceville, GA 30046 678.407.9904

General / Misc

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Things to Know About the Cost of Auto Repair

Profit margins in the automotive service industry are a lot narrower than many people imagine. Cars are far more complex, thus the tools and diagnostic equipment are also more complicated and expensiv...
Published on: Sep 21, 2025

The Problems with a Cream Puff (Dormant Vehicles)

You may own a vehicle that you only drive occasionally.  Maybe it is a summer day cruiser, an off-roader, or vacation hauler.  Here are some things you need to know about a vehicle that does...
Published on: Aug 17, 2025

Alternator

Question My battery keeps going dead. I had it tested and it is fine - what could be the problem? Answer Well, your problem could be caused by several things.  Let's start with a likely suspec...
Published on: Jul 20, 2025

Serpentine Belt

You know that long belt that snakes around the front of your engine? It's called the serpentine belt. The serpentine belt is driven by the engine as it turns. It powers your alternator, air conditioni...
Published on: Jun 01, 2025

Exhaust

We’ve all heard a car or truck that needs a new muffler.  But there’s more to the exhaust system than just the muffler.  The exhaust system has three main functions: To safel...
Published on: May 18, 2025

Busted in Lawrenceville: The Maintenance Free Myth

Quality surveys report fewer problems with new cars than ever before.  So, does that mean that modern vehicles have become maintenance free? Back when cars spent more time in the repair shop, pe...
Published on: Apr 27, 2025

Heater Core

{{ image('MzU0') }} Lawrenceville drivers may wonder where the air in a vehicle's passenger compartment comes from. Well, as your engine starts to warm up, it also warms the coolant/antifre...
Published on: Apr 06, 2025

Thermostat

The thermostat is part of your cooling system. Lawrenceville residents' vehicle thermostats perform a similar function to the thermostats in their homes. At home, you set your thermostat to maintain a...
Published on: Mar 09, 2025