I find their shipping cost is very high. I was looking at a part that cost $5.70 (13500936 - very small part and could go through normal mailing at regular stamp price), CheapestGMParts.com would sell it for $3.86 but the shipping was $13.91 bring the total to $17.77. CT dealers even if they charge me the full price at $5.70 plus CT tax would comes to only $6.06. Their shipping cost cuts into the savings. Maybe on higher price items there is some savings but I could do better at local Chevy dealers with their discounts. If you buy the item at a Chevy garage and have them do the labor - Chevy will warranty the item for three years or 36,000 miles.