Looking for suggestions.

[07HD]

What's the best or most used online GM parts store, I have used partsonline.com and gmpartsdirect.com. Just looking to compare prices. I just priced an item from a GMC dealer for $245 they discounted it $40 when they found out I bought the truck there. I found the same thing online for $133, go figure.

[Another JR]

I’ve used a few of the on line parts sellers with no problems. I don’t think there’s any one that stands out. 
 

Maybe check with other GMC and Chevy dealers in your area.  My GMC dealer where I bought my truck charges msrp for parts. However, I’ve been going to the Chevy dealer across the street from them for parts for my 93 chevy truck and 2004 yukon, and will for my new GMC truck.   I get prices from them similar to the online dealers and get lots of free advice. You just give them the VIN and make sure they know it’s a GMC. They sold me an OEM rubber bed mat for less than I could get it on line.  They both order from the same regional warehouse. 

[kylant]

most online places are similar. i look for the place that is closest to me, has contact information (phone number), and has the lowest shipping costs. a lot of these places nail you with the shipping

[Another JR]

Agreed, particularly on heavy items. Those types of part my local Chevy dealer is often the best net price. 

[CT Chevy Connoisseur]

Find the parts online place that is closest to your location.  I am in CT and Tasca had great shipping rates because they are in RI.  Others in CA, etc. had crazy high shipping rates.  Part prices at all are usually fairly similar.

[CT Chevy Connoisseur]

Just now, CT Chevy Connoisseur said:

Find the parts online place that is closest to your location.  I am in CT and Tasca had great shipping rates because they are in RI.  Others in CA, etc. had crazy high shipping rates.  Part prices at all are usually fairly similar.

For example, center console shipped to me for $18 - other online parts dealers were looking over $50+ for shipping