Coming off losses to leaders Fremantle and Adelaide, the high-flying Swans were untroubled from the opening ball-up as they cruised to a 21.13 (139) to 13.10 (88) victory at ENGIE Stadium on Saturday.
Errol Gulden collected his fourth Kirk-Ward Medal as the best player in the Sydney Derby, racking up 41 disposals, seven clearances and 1045 metres gained, the most in Swans history.
Brodie Grundy (23 disposals, one goal) was supreme in ruck, while Chad Warner (32, one), Isaac Heeney (25, one), Nick Blakey (24, one) and James Rowbottom (23, two) all had the Giants' measure.
Charlie Curnow kicked four goals and Logan McDonald added three.
"Overall, I thought we got back to playing the brand that we wanted to play," said Sydney coach Dean Cox after his team improved to 14-5.
"We got to the positions we needed to, we scored efficiently when we were inside 50.
"We took our opportunities and we were able to defend really strongly.
"Our ability to restrict scores was high, especially in the first half."
Adding injury to insult for GWS (8-11), who have now lost seven of the past eight derbies, midfielder Finn Callaghan hobbled off in the dying minutes after rolling his right ankle.
The Swans made a brisk start, booting the first five goals inside the opening 13 minutes and streaked ahead by 33 points at quarter-time.
Warner slotted a magnificent snap on his non-preferred left foot early in the second term via a sharp handball from Heeney, who read Grundy's deft ruck tap best.
Giants backman Jayden Laverde miscued the chance for a rare goal following back-to-back 50m penalties against Curnow.
Billy Cootee made GWS pay moments later, showing how it's done when he converted a 50m penalty.
The Giants' skill level was poor and their defensive pressure non-existent, laying a paltry four tackles in the second period despite being second to the footy.
Gulden had the ball on a string, Curnow was having the better of Sam Taylor and Sydney's advantage blew out to 53 points at half-time.
GWS showed a lot more fight after the main break, outscoring Sydney in the second half but the damage was already done.
Clayton Oliver (29 touches, one goal) toiled hard in the midfield for the Giants, as did Connor Idun (27), Lachie Whitfield (26) and Lachie Ash (26) in defence.
"I was surprised and disappointed," GWS coach Kingsley said of the Giants' poor first half.
"You don't see the fluctuations with the best teams like you've seen with us this year.
"That suggests we're not one of them absolute elite teams.
"That clearance part (46-25 favouring the Swans) ultimately was the difference."
"The way we started the game, (in) the first quarter, they scored too easily and that was largely stoppage."
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