Some of the easiest sights that you can find 1988 Chevy parts will be Craigslist, and ebay, you can also check the local car dismantlers shops and see if they have anything.
A 1988 Chevy truck is unlikely to be found at a normal car showroom. It is possible that someone might be able to find one at their local Chevy truck showroom but it is more likely it can be bought online through somewhere like Craigslist.
You can find parts and accessories for your truck for cheap on popular websites such as amazon, craigslist, and eBay
In a Haynes manual - what particular system are you looking for?
One can find Chevy HHR accessories from the 'HHR Boutique' website. They sell interior and exterior accessories. They can also be purchased from 'CarID' and 'JC Whitney'.
One can purchase accessories for their Ford truck direct from a Ford dealership, or order online from Ford's website. One can also find Ford truck accessories from ebay.
Truck addons is a site dedicated to truck and SUV accessories. A great place to shop is Line-X in Knoxville, Tennessee. They have been in business since 1982.
Chevy Tahoe lift kits can be purchased at websites, such as Auto Accessories Garage, Summit Racing and Auto Anything. Chevy Tahoe lift kits can make a truck look and perform great.
Many truck accessories stores are found in Austin, Texas. Some of the stores are Custom Truck Outfitters, Advanced Auto Parts, and Texas Truck and Trailer.
There are several places where you can purchase cute truck accessories, online web sites such as Truck Add Ons, JC Whitney, etc. Places like Auto Zone, Aid auto stores, Walmart and Kmart are great places to possibly find cute truck accessories as well.
You can find good truck accessories at any of the leading internet sights such as ebay.com and target.com and facebook.com People will post things they wish to get rid of for a good cheap price.
If one is wanting to find a variety of Chevy Trailblazer accessories there are a few sites that offer good inventory. One can find these accessories on sites such as Car ID, Auto Anything or Auto Parts Warehouse.
There are several places I found to find these accessories. Amazon.com is a good site, as well as bizrate.com. I also found a specific site with a lot of accessories without doing several searches. http://www.bizrate.com/automotive-accessories/hello-kitty-truck-accessories/