I have a late model 1999 Chevy Silverado. 4.3 l v 6 and I am replacing the AC compressor and accumulator.
the suction line from the comp. passes behind the throttle body and the firewall .
the accumulator I bought’s flange is about 30 degrees off and the hard tubing will not fit.
the guy at the parts house says it’s the right accumulator. Is there some kind of tubing modification that I don’t know of ?

 

Take the unit you have that doesn't fit and pay NO ATTENTION to what your parts guy says. If that accumulator won't fit, it's the wrong one. Parts store employees are not expert mechanics and I am an expert when it comes to automotive air conditioning systems and although I am not a certified mechanic, when it come to A/C systems, I've installed two in vehicles with no A/C.in my lifetime.

Now, instead of bragging, let us get down to the core of your issue. You need a proper accumulator, that will fit with NO modifications. If needed, I will search for it but it late here and I have to sleep. Please try one of our sponsors, CARiD, as
they will likely have the part you need. I have no association with them and this advice won't make a penny for me.

Here is a link to their website:

https://www.carid.com/search/airconditiong+accumulator/code-7ba605ac7d4ba366f1afd499d5351283/queryId-
1b56c610b9664bbf4183764748a66e5d/garageMmyId-116375/ymm-1999%7CChevy%7CCK-Pickup#products
.
Once you find the proper accumulator you will need to add a few ounces of PAG 150 oil into the unit as well as your new
compressor. Total amount of PAG 150 for your system is 8 ounces, so don't overdo it. And put a coat of PAG on any O-rings and vacuum the system out for a bare minimum of half an hour at 70 F degrees, at -30 PSI. An hour would be better. When adding R-134A to the system, flush the atmo out by installing the line, use a burst of refrigerant that will leak past the threads, then connect the line down hard. Air is not good at all for any A/C system. This happens all too many times, even in major automotive dealers repair shops Make sure you don't overcharge by looking up the specs on your vehicle by weight of R-134A required, and you'll have the A/C repaired for many years.

 

thank you for your information, i will need that info when i go back together. ill also check out the link to the accumulators available.